Lenovo G41-35 Hardware Maintenance Manual
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Lenovo G41-35 Hardware Maintenance Manual

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  • Page 1 Lenovo G41-35/G51-35 Hardware Maintenance Manual...
  • Page 2 • Before using this information and the product it supports, be sure to read the general information under “Notices” on page 91. • This manual applies to the following models: Lenovo G41-35/G51-35. The illustrations used in this manual are for Lenovo G51-35 unless otherwise stated.

  • Page 3: Table Of Contents

    Power-on password ..........24 Hard-disk password ..........24 Administrator password ........24 Power management ........25 Screen blank state ..........25 Putting the computer to sleep or shutting it down ..............25 Putting your computer to sleep ......25 Shutting down the computer ......25 Lenovo G41-35/G51-35 ....... 26 Specifications ..........26 Status indicators ........... 28 Hotkeys............29 FRU replacement notices ......30 Screw notices ..........30 Removing and replacing an FRU ....31 1010 Battery pack ..........32 1020 Base cover ..........33 1030 Optical drive .

  • Page 4: About This Manual

    • The product-specific section includes service, reference, and product-specific parts information. Important: This manual is intended only for trained servicers who are familiar with Lenovo products. Use this manual to troubleshoot problems effectively. Before servicing a Lenovo product, make sure to read all the information under “Safety information” on page 1 and “Important service information” on page 16.

  • Page 5: Safety Information

    Safety information Safety information This chapter presents the following safety information that you need to get familiar with before you service a Lenovo G41-35/G51-35 computer: • “General safety” on page 2 • “Electrical safety” on page 3 • “Safety inspection guide” on page 5 • “Handling devices that are sensitive to electrostatic discharge” on page 6 • “Grounding requirements” on page 6 • “Safety notices: multilingual translations” on page 7 • “Laser compliance statement” on page 14...

  • Page 6: General Safety

    G41-35/G51-35 Hardware Maintenance Manual General safety Follow these rules below to ensure general safety: • Observe a good housekeeping in the area where the machines are put during and after the maintenance. • When lifting any heavy object: 1. Make sure that you can stand safely without slipping. 2. Distribute the weight of the object equally between your feet. 3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift it. 4. Lift it by standing or pushing up with your leg muscles; this action could avoid the strain from the muscles in your back. Do not attempt to lift any object that weighs more than 16 kg (35 lb) or that you think is too heavy for you. • Do not perform any action that causes hazards to the customer, or that makes the machine unsafe.

  • Page 7: Electrical Safety

    Safety information Electrical safety Observe the following rules when working on electrical equipments. Important: Use only approved tools and test equipments. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have rubber floor mats near their machines that contain small conductive fibers to decrease electrostatic discharges.
  • Page 8 G41-35/G51-35 Hardware Maintenance Manual • Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors, nongrounded power extension cables, power surges, and missing safety grounds. • Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is conductive; such touching can cause personal injury and machine damage. • Do not service the following parts with the power on when they are removed from their normal operating places in a machine: – Power supply units – Pumps – Blowers and fans – Motor generators and similar units. (This practice ensures correct grounding of the units.) • If an electrical accident occurs: – Caution: do not become a victim yourself.

  • Page 9: Safety Inspection Guide

    The power cord should be the type specified in the parts list. c. Insulation must not be frayed or worn. 4. Check for cracked or bulging batteries. 5. Remove the cover. 6. Check for any obvious non-Lenovo alterations. Use good judgment as to the safety of any non-Lenovo alterations. 7. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage. 8. Check for worn, frayed, or pinched cables.

  • Page 10: Handling Devices That Are Sensitive To Electrostatic Discharge

    G41-35/G51-35 Hardware Maintenance Manual Handling devices that are sensitive to electrostatic discharge Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge. Notes: 1. Use product-specific ESD procedures when they exceed the requirements noted here.

  • Page 11: Safety Notices: Multilingual Translations

    Safety information Safety notices: multilingual translations The safety notices in this section are provided in English, French, German, Hebrew, Italian, Japanese, and Spanish. Safety notice 1 Before the computer is powered on after FRU replacement, make sure all screws, springs, and other small parts are in place and are not left loose inside the computer.
  • Page 12 G41-35/G51-35 Hardware Maintenance Manual Safety notice 2 DANGER Some standby batteries contain a small amount of nickel and cadmium. Do not disassemble a standby battery, recharge it, throw it into fire or water, or short- circuit it. Dispose of the battery as required by local ordinances or regulations.
  • Page 13 Safety information Safety notice 3 DANGER The battery pack contains small amounts of nickel. Do not disassemble it, throw it into fire or water, or short-circuit it. Dispose of the battery pack as required by local ordinances or regulations. Use only the battery in the appropriate parts listing when replacing the battery pack.
  • Page 14 G41-35/G51-35 Hardware Maintenance Manual Safety notice 4 DANGER The lithium battery can cause a fire, an explosion, or a severe burn. Do not recharge it, remove its polarized connector, disassemble it, heat it above 100°C (212°F), incinerate it, or expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations.
  • Page 15 Safety information Safety notice 5 If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your hands, immediately wash the affected areas with water at least for 15 minutes. Seek medical care if any symptoms caused by the fluid are present after washing. Si le panneau d’affichage à...
  • Page 16 G41-35/G51-35 Hardware Maintenance Manual Safety notice 6 DANGER To avoid shock, do not remove the plastic cover that protects the lower part of the inverter card. Afin d’éviter tout risque de choc électrique, ne retirez pas le cache en plastique protégeant la partie inférieure de la carte d’alimentation.
  • Page 17 Safety information Safety notice 8 DANGER Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any interconnecting cables. Avant de retirer une unité remplaçable en clientèle, mettez le système hors tension, débranchez tous les cordons d’alimentation des socles de prise de courant, retirez la batterie et déconnectez tous les cordons d’interface.

  • Page 18: Laser Compliance Statement

    G41-35/G51-35 Hardware Maintenance Manual Laser compliance statement Some models of Lenovo computer are equipped from the factory with an optical storage device such as a CD-ROM drive or a DVD-ROM drive. Such devices are also sold separately as options. If one of these drives is installed, it is certified in the U.S. to conform to the requirements of the Department of Health and Human Services 21 Code of Federal Regulations (DHHS 21 CFR) Subchapter J for Class 1 laser products. Elsewhere, the drive is certified to conform to the requirements of the International Electrotechnical Commission (IEC) 825 and CENELEC EN 60 825 for Class 1 laser products.
  • Page 19 Safety information A CD-ROM drive, a DVD-ROM drive, or any other storage device installed may contain an embedded Class 3A or Class 3B laser diode. Note the following: DANGER Emits visible and invisible laser radiation when open. Do not stare into the beam, do not view directly with optical instruments, and avoid direct exposure to the beam. Radiação por raio laser ao abrir. Não olhe fixo no feixe de luz, não olhe diretamente por meio de instrumentos óticos e evite exposição direta com o feixe de luz.

  • Page 20: Important Service Information

    Strategy for replacing FRUs Before replacing parts: Make sure that all software fixes, drivers, and BIOS downloads are installed before replacing any FRUs listed in this manual. After a system board is replaced, ensure that the latest BIOS is loaded to the system board before completing the service action. To download software fixes, drivers, and BIOS, follow the steps below: 1. Go to http://support.lenovo.com. 2. Enter the serial number or select a product or use Lenovo smart downloading. 3. Select the BIOS/Driver/Applications and download. 4. Follow the directions on the screen and install the necessary software.

  • Page 21: Strategy For Replacing A Hard Disk Drive

    Important service information Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs: • If you are instructed to replace an FRU, but the replacement does not solve the problem, reinstall the original FRU before you continue. • Some computers have both a processor board and a system board. If you are instructed to replace either of them, and replacing one of them does not solve the problem, reinstall that board, and then replace the other one. • If an adapter or a device consists of more than one FRU, any of the FRUs may be the cause of the error. Before replacing the adapter or device, remove the FRUs one by one to see if the symptoms change. Replace only the FRU that changed the symptoms. Attention: The setup configuration on the computer you are servicing may have been customized. Running Automatic Configuration may alter the settings. Note the current configuration settings (using the View Configuration option); then, when service has been completed, verify that those settings remain in effect.

  • Page 22: Important Information About Replacing Rohs Compliant Frus

    Electronic Equipment Directive (2002/95/EC) is a European Union legal requirement affecting the global electronics industry. RoHS requirements must be implemented on Lenovo products placed on the market after June 2006. Products on the market before June 2006 are not required to have RoHS compliant parts.

  • Page 23: General Checkout

    General checkout General checkout This chapter presents the following information: • “What to do first” on page 20 • “Power system checkout” on page 21 Before you go to the checkout, make sure to read the following important notes: Important notes: • Only certified trained personnel can service the computer. • Before replacing any FRU, read the entire page on removing and replacing FRUs. • Carefully remove screws for reuse when replacing FRUs. • Be extremely careful during such write operations as copying, saving, or formatting. Drives in the computer that you are servicing sequence might have been altered.

  • Page 24: What To Do First

    G41-35/G51-35 Hardware Maintenance Manual What to do first When you do return an FRU, you must include the following information in the parts exchange form or parts return form that you attach to it: 1. Name and phone number of servicer 2. Date of service 3. Date on which the machine failed 4. Date of purchase 5. Procedure index and page number in which the failing FRU was detected 6. Failing FRU name and part number 7. Machine type, model number, and serial number 8. Customer’s name and address Note for warranty: During the warranty period, the customer may be responsible for repair costs if the computer damage was caused by misuse, accident, modification, unsuitable physical or operating environment, or improper maintenance by the customer.

  • Page 25: Power System Checkout

    • If the computer does not charge during operation, go to “Checking operational charging”. To check the AC adapter, follow the steps below: 1. Unplug the AC adapter cable from the computer. 2. Measure the output voltage at the plug of the AC adapter cable. See the following figure: Voltage (V DC) Note: Output voltage for the AC adapter pin No. 2 may differ from the one you are servicing. 3. If the voltage is not correct, replace the AC adapter. 4. If the voltage is acceptable, do the following: • Replace the system board. • If the problem persists, go to “Lenovo G41-35/G51-35” on page 26. Note: Noise from the AC adapter does not always indicate a defect. Checking operational charging To check whether the battery charges properly during operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.

  • Page 26: Checking The Battery Pack

    G41-35/G51-35 Hardware Maintenance Manual Perform operational charging. If the battery status indicator or icon does not light on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon is still off, replace the battery pack.

  • Page 27: Related Service Information

    Recovery System. In order to save application files and the initial backed up files of the system, the hard disk in a Lenovo computer includes a hidden partition when it is shipped. If you need to restore the system to the point of your first boot up, just enter Lenovo OneKey Recovery System and run System Recovery.

  • Page 28: Passwords

    G41-35/G51-35 Hardware Maintenance Manual Passwords As many as three passwords may be needed for any Lenovo computer: the power-on password (POP), the hard disk password (HDP), and the administrator password. If any of these passwords has been set, a prompt for it appears on the screen whenever the computer is turned on.

  • Page 29: Power Management

    Related service information Power management Note: Power management modes are not supported for APM operating system. To reduce power consumption, the computer has three power management modes: screen blank, sleep (standby), and hibernation. Screen blank state If the time set on the “Turn off monitor” timer in the operating system expires, the LCD backlight turns off.

  • Page 30: Lenovo G41-35/G51-35

    • “FRU replacement notices” on page 30 • “Removing and replacing an FRU” on page 31 • “Locations” on page 70 • “Parts list” on page 73 Specifications The following table lists the specifications of the Lenovo G41-35/G51-35: Table 1. Specifications Feature Description Processor • See the system properties of your computer, you can do this as...
  • Page 31 Lenovo G41-35/G51-35 Table 1. Specifications (continued) Feature Description Bluetooth • Combined in combo card wireless Keyboard • 6 rows Lenovo Keyboard Touchpad • Multi-touch type Integrated • HD (720p)/0.3 M camera Battery • 4 cell, 32 Wh / 41 Wh AC adapter • 20 V, DIS 65 W, UMA 45 W Pre-installed • Win 8.1/Win 10 64bits operating • Free-DOS/Linpus system...

  • Page 32: Status Indicators

    G41-35/G51-35 Hardware Maintenance Manual Status indicators The system status indicators below show the computer status: Table 2. Status indicators Indicator Charge Indicator Meaning status status On (solid white) The computer is powered on. Blinking The computer is in sleep mode.

  • Page 33: Hotkeys

    Lenovo G41-35/G51-35 Hotkeys You can access certain system settings quickly by pressing the appropriate hotkeys. Table 3. Hotkeys Mutes/unmutes the sound. Decreases the volume level. Increases the volume level. Closes the currently active window. Refreshes the desktop or the currently active window.

  • Page 34: Fru Replacement Notices

    G41-35/G51-35 Hardware Maintenance Manual FRU replacement notices This section presents notices related to removing and replacing parts. Read this section carefully before replacing any FRU. Screw notices Loose screws can cause a reliability problem. In the Lenovo computer, this problem is addressed with special nylon-coated screws that have the following characteristics: • They maintain tight connections. • They do not easily come loose, even with shock or vibration. • They are harder to tighten.

  • Page 35: Removing And Replacing An Fru

    Before touching it, establish personal grounding by touching a ground point with one hand or using an electrostatic discharge (ESD) strap (P/N 6405959) to remove potential shock reasons. Notes: • The following procedures about removing and replacing FRUs are the same for the Lenovo G41-35/G51-35. • The illustrations used in this section are of the Lenovo G51-35, unless otherwise stated.

  • Page 36: 1010 Battery Pack

    G41-35/G51-35 Hardware Maintenance Manual 1010 Battery pack DANGER Only use the battery specified in the parts list for your computer. Any other battery could ignite or explode. Figure 1. Removal steps of battery pack Unlock the manual latch 1. Slide the spring-loaded latch to the unlocked position 2 to eject the battery pack. Lift up the inner edge of the battery pack,...

  • Page 37: 1020 Base Cover

    Lenovo G41-35/G51-35 1020 Base cover For access, remove this FRU: • “1010 Battery pack” on page 32 Figure 2. Removal steps of base cover Remove the screws 1. Then remove the base cover 2. G41-35 G51-35 Step Screw (quantity) Color Torque M2.5 × 6 mm, Phillips-head, nylok-coated (2) Black 2.5 ~ 3.0 kgf*cm BIG DOOR to SYS (G41-35) M2.5 × 6 mm, Phillips-head, nylok-coated (3) Black 2.5 ~ 3.0 kgf*cm D+C (G51-35)
  • Page 38 G41-35/G51-35 Hardware Maintenance Manual Note: Applying labels to the base cover The new base cover FRU is shipped with a kit containing labels of several kinds. When you replace the base cover, you need to apply the following label: The following labels need to be peeled off from the old base cover and put on the new base cover.

  • Page 39: 1030 Optical Drive

    Lenovo G41-35/G51-35 1030 Optical drive For access, remove this FRU: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 Figure 3. Removal steps of optical drive Remove the screw 1. Pull the optical drive out in the direction shown by arrow 2. Step Screw (quantity) Color Torque M2 × 6 mm, Phillips-head, nylok-coated (1) Black 1.5 ~ 2.0 kgf*cm...

  • Page 40: 1040 Hard Disk Drive

    G41-35/G51-35 Hardware Maintenance Manual 1040 Hard disk drive For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 Attention: • Do not drop the hard disk drive or apply any physical shock to it. The hard disk drive is sensitive to physical shock. Improper handling can cause damage and permanent loss of data. • Before removing the drive, suggest the customer to backup all the information on it if possible.
  • Page 41 Color Torque M2 × 6 mm, Phillips-head, nylok-coated (3) Black 1.5 ~ 2.0 kgf*cm HDD BKT to D (G41-35) M2 × 6 mm, Phillips-head, nylok-coated (4) Black 1.5 ~ 2.0 kgf*cm HDD BRK + D (G51-35) When installing: Make sure that the HDD connector is attached firmly.

  • Page 42: 1050 Pci Express Mini Card For Wireless Lan

    G41-35/G51-35 Hardware Maintenance Manual 1050 PCI Express Mini Card for wireless LAN For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 Figure 5. Removal steps of PCI Express Mini Card for wireless LAN Disconnect the two wireless LAN cables (black, grey) 1, and then remove the screw 2. In step 1, unplug the jacks by using the removal tool antenna RF connector (P/N: 08K7159), or pick up the connectors with your fingers and gently unplug them in the direction shown by the arrows. Notes: The wireless LAN card has 2 cables in step 1. The wireless LAN card in some models might have 3 cables in step 1. Step Screw (quantity) Color Torque M2 × 3.5 mm, Phillips-head, nylok-coated (1)
  • Page 43 Lenovo G41-35/G51-35 Figure 5. Removal steps of PCI Express Mini Card for wireless LAN (continued) Remove the card in the direction shown by arrow 3. When installing: • In models with a wireless LAN card that has two antenna connectors, plug the black cable (1st) (MAIN) into the jack labeled MAIN, and the grey cable (2nd) (AUX) into the jack labeled AUX on the card. • In models with a wireless LAN card that has three antenna connectors, plug the black cable (1st) (MAIN) into the jack labeled 1, the grey cable (3rd) into the jack labeled 3, and the white cable (2nd) (AUX) into the jack labeled 2 on the card.

  • Page 44: 1060 Dimm

    G41-35/G51-35 Hardware Maintenance Manual 1060 DIMM For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 Figure 6. Removal steps of DIMM Release the two latches on both edges of the socket at the same time in the directions shown by arrows 1, and then unplug the DIMM in the direction shown by arrow 2. When installing: Insert the notched end of the DIMM into the socket. Push the DIMM firmly, and pivot it until it snaps into place. Make sure that it is firmly fixed in the slot and is difficult to move. Note: When replacing the memory is completed, you need to restart the computer after the first reboot.

  • Page 45: 1070 Fan Assembly

    Lenovo G41-35/G51-35 1070 Fan assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 Figure 7. Removal steps of fan assembly Unplug the fan connector in the direction shown by arrow 1. Then remove the screws 2.
  • Page 46 G41-35/G51-35 Hardware Maintenance Manual Figure 7. Removal steps of fan assembly (continued) Remove the fan 3.

  • Page 47: 1080 Keyboard

    Lenovo G41-35/G51-35 1080 Keyboard For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 • “1070 Fan assembly” on page 41 Figure 8. Removal steps of keyboard Remove the screws 1. G41-35 G51-35 Step Screw (quantity) Color Torque M2 × 6 mm, Phillips-head, nylok-coated (3) Black 1.5 ~ 2.0 kgf*cm D to KB & ODD BKT to D to MB to KB (G41-35) M2 × 6 mm, Phillips-head, nylok-coated (3) Black 1.5 ~ 2.0 kgf*cm KB + D (G51-35)
  • Page 48 G41-35/G51-35 Hardware Maintenance Manual Figure 8. Removal steps of keyboard (continued) Insert the screwdriver into the bottom hole 2. Then pull the keyboard out of the keyboard bezel 3.
  • Page 49 Lenovo G41-35/G51-35 Figure 8. Removal steps of keyboard (continued) Lift the keyboard slightly 4. Detach the connectors in the directions shown by arrows 5 and 6. Then remove the keyboard. When installing: Make sure that the FPC connector is attached firmly.

  • Page 50: 1090 Keyboard Bezel

    G41-35/G51-35 Hardware Maintenance Manual 1090 Keyboard bezel For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 • “1030 Optical drive” on page 35 • “1040 Hard disk drive” on page 36 • “1070 Fan assembly” on page 41 • “1080 Keyboard” on page 43 Figure 9. Removal steps of keyboard bezel Remove the screws 1 and 2. G41-35 Step Screw (quantity) Color Torque M2.5 × 6 mm, Phillips-head, nylok-coated (6) Black 2.5 ~ 3.0 kgf*cm D to SYS (ID hole) M2 × 6 mm, Phillips-head, nylok-coated (4) Black 1.5 ~ 2.0 kgf*cm...
  • Page 51 Lenovo G41-35/G51-35 Figure 9. Removal steps of keyboard bezel (continued) G51-35 Step Screw (quantity) Color Torque M2.5 × 6 mm, Phillips-head, nylok-coated (8) D + C Black 2.5 ~ 3.0 kgf*cm M2 × 6 mm, Phillips-head, nylok-coated (1) D + C Black 1.5 ~ 2.0 kgf*cm Disconnect the touchpad cable connector and the power board connector in the directions shown by arrows 3 and 4. G41-35...
  • Page 52 G41-35/G51-35 Hardware Maintenance Manual Figure 9. Removal steps of keyboard bezel (continued) G51-35 Remove the keyboard bezel in the direction shown by arrow 5. G41-35...
  • Page 53 Lenovo G41-35/G51-35 Figure 9. Removal steps of keyboard bezel (continued) G51-35 Remove the screw 6. Carefully remove the power board in the direction shown by arrow 7. G41-35...
  • Page 54 G41-35/G51-35 Hardware Maintenance Manual Figure 9. Removal steps of keyboard bezel (continued) G51-35 Step Screw (quantity) Color Torque M2 × 2.5 mm, Phillips-head, nylok-coated (1) Black 1.5 ~ 2.0 kgf*cm Power BD to C (G41-35) M2 × 3.5 mm, Phillips-head, nylok-coated (1) Black 1.5 ~ 2.0 kgf*cm Power BD+C (G51-35)

  • Page 55: 1100 Odd Board (G51-35) And Usb&Audio Board

    Lenovo G41-35/G51-35 1100 ODD board (G51-35) and USB&audio board For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 • “1030 Optical drive” on page 35 • “1040 Hard disk drive” on page 36 • “1050 PCI Express Mini Card for wireless LAN” on page 38 • “1070 Fan assembly” on page 41 • “1080 Keyboard” on page 43 • “1090 Keyboard bezel” on page 46 Figure 10. Removal steps of ODD board (G51-35) and USB&audio board Detach the ODD board connector in the directions shown by arrows 1 and 2. Remove the screw 3. G51-35...
  • Page 56 G41-35/G51-35 Hardware Maintenance Manual Figure 10. Removal steps of ODD board (G51-35) and USB&audio board (continued) Remove the ODD board 4. G51-35...
  • Page 57 Lenovo G41-35/G51-35 Figure 10. Removal steps of ODD board (G51-35) and USB&audio board (continued) Detach the USB&audio board connector in the directions shown by arrows 5 and 6. Remove the screw 7. G41-35...
  • Page 58 G41-35/G51-35 Hardware Maintenance Manual Figure 10. Removal steps of ODD board (G51-35) and USB&audio board (continued) G51-35 Step Screw (quantity) Color Torque M2 × 3.5 mm, Phillips-head, nylok-coated (1) Black 1.5 ~ 2.0 kgf*cm USB board + D...
  • Page 59 Lenovo G41-35/G51-35 Figure 10. Removal steps of ODD board (G51-35) and USB&audio board (continued) Remove the USB&audio board 8. G41-35 G51-35...

  • Page 60: 1110 System Board

    G41-35/G51-35 Hardware Maintenance Manual 1110 System board Important notices for handling the system board: When handling the system board, bear the following in mind. • Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or composite.
  • Page 61 Lenovo G41-35/G51-35 Figure 11. Removal steps of system board (continued) G51-35 Unplug the speaker connector in the direction shown by arrow 3. Remove the screws 4. G41-35...
  • Page 62 G41-35/G51-35 Hardware Maintenance Manual Figure 11. Removal steps of system board (continued) G51-35 Step Screw (quantity) Color Torque M2 × 3.5 mm, Phillips-head, nylok-coated (2) Black 1.5 ~ 2.0 kgf*cm MB + D (G41-35) M2 × 3.5 mm, Phillips-head, nylok-coated (3) Black 1.5 ~ 2.0 kgf*cm...
  • Page 63 Lenovo G41-35/G51-35 Figure 11. Removal steps of system board (continued) Remove the system board in the direction shown by arrow 5. G41-35 G51-35...

  • Page 64: 1120 Heat Sink Assembly

    G41-35/G51-35 Hardware Maintenance Manual 1120 Heat sink assembly For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 • “1030 Optical drive” on page 35 • “1040 Hard disk drive” on page 36 • “1050 PCI Express Mini Card for wireless LAN” on page 38 • “1070 Fan assembly” on page 41 • “1080 Keyboard” on page 43 • “1090 Keyboard bezel” on page 46 • “1100 ODD board (G51-35) and USB&audio board” on page 51 • “1110 System board” on page 56 Figure 12. Removal steps of heat sink assembly Remove the screws 1. Step Screw (quantity)
  • Page 65 Lenovo G41-35/G51-35 Figure 12. Removal steps of heat sink assembly (continued) Lift the heat sink assembly in the direction shown by arrow 2. When installing: Make sure that the connector is attached firmly. When installing: Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, to the part shown in the figure above. Either too much or too less grease application can cause a thermal problem due to imperfect contact with a component.

  • Page 66: 1130 Speakers And Dc-In Cable

    G41-35/G51-35 Hardware Maintenance Manual 1130 Speakers and DC-in cable For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 • “1030 Optical drive” on page 35 • “1040 Hard disk drive” on page 36 • “1050 PCI Express Mini Card for wireless LAN” on page 38 • “1070 Fan assembly” on page 41 • “1080 Keyboard” on page 43 • “1090 Keyboard bezel” on page 46 • “1100 ODD board (G51-35) and USB&audio board” on page 51 • “1110 System board” on page 56 Figure 13. Removal steps of speakers and DC-in cable Remove the speakers in the direction shown by arrows 1.
  • Page 67 Lenovo G41-35/G51-35 Figure 13. Removal steps of speakers and DC-in cable (continued) Remove the DC-in cable in the direction shown by arrow 2.

  • Page 68: 1140 Lcd Unit

    G41-35/G51-35 Hardware Maintenance Manual 1140 LCD unit For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 • “1030 Optical drive” on page 35 • “1040 Hard disk drive” on page 36 • “1050 PCI Express Mini Card for wireless LAN” on page 38 • “1070 Fan assembly” on page 41 • “1080 Keyboard” on page 43 • “1090 Keyboard bezel” on page 46 • “1100 ODD board (G51-35) and USB&audio board” on page 51 • “1110 System board” on page 56 • “1130 Speakers and DC-in cable” on page 62 Figure 14. Removal steps of LCD unit Release the antenna cables from the cable guides and then remove the screws 1. Step...
  • Page 69 Lenovo G41-35/G51-35 Figure 14. Removal steps of LCD unit (continued) When installing: • Route the antenna cables along the cable guides. As you route the cables, make sure that they are not subjected to any tension. Tension could cause the cables to be damaged by the cable guides, or a wire to be broken. • Make sure that the LCD connector is attached firmly and that you do not pinch the antenna cables when you attach the LCD assembly. Route the LCD cable along the cable guides.

  • Page 70: 1150 Lcd Front Bezel, Lcd Panel, And Hinges

    G41-35/G51-35 Hardware Maintenance Manual 1150 LCD front bezel, LCD panel, and hinges For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 • “1030 Optical drive” on page 35 • “1040 Hard disk drive” on page 36 • “1050 PCI Express Mini Card for wireless LAN” on page 38 • “1070 Fan assembly” on page 41 • “1080 Keyboard” on page 43 • “1090 Keyboard bezel” on page 46 • “1100 ODD board (G51-35) and USB&audio board” on page 51 • “1110 System board” on page 56 • “1130 Speakers and DC-in cable” on page 62 • “1140 LCD unit” on page 64 Figure 15. Removal steps of LCD front bezel, LCD panel, and hinges...
  • Page 71 Lenovo G41-35/G51-35 Figure 15. Removal steps of LCD front bezel, LCD panel, and hinges (continued) Remove the screws 2. Lift the LCD panel slightly 3. Peel off the adhesive tape and detach the connector in the direction shown by arrow 4. Then remove the LCD panel.
  • Page 72 G41-35/G51-35 Hardware Maintenance Manual Figure 15. Removal steps of LCD front bezel, LCD panel, and hinges (continued) Then release the hinges in the direction shown by arrows 6.

  • Page 73: 1160 Camera

    Lenovo G41-35/G51-35 1160 Camera For access, remove these FRUs in order: • “1010 Battery pack” on page 32 • “1020 Base cover” on page 33 • “1030 Optical drive” on page 35 • “1040 Hard disk drive” on page 36 • “1050 PCI Express Mini Card for wireless LAN”...

  • Page 74: Locations

    G41-35/G51-35 Hardware Maintenance Manual Locations Front view and right-side view 1 Integrated camera 2 Built-in microphone Note: Select models may have two microphones, please refer to the actual product. 3 Wireless LAN antennas 4 Computer display 5 Power button 6 Touchpad 7 System status indicators Note: For the description of each indicator, see “Status indicators” on page 28. 8 Combo audio jack 9 Memory card slot J USB port K Optical drive L Kensington lock slot G41-35...
  • Page 75 Lenovo G41-35/G51-35 G51-35...

  • Page 76: Bottom And Left-Side View

    G41-35/G51-35 Hardware Maintenance Manual Bottom and Left-side view 1 Speaker 2 USB port 3 HDMI port 4 RJ-45 port 5 VGA port 6 Fan louvers 7 Novo button 8 AC power adapter jack G41-35 G51-35...

  • Page 77: Parts List

    Lenovo G41-35/G51-35 Parts list This section presents the following service parts: • “Overall” on page 74 • “LCD FRUs” on page 79 • “Keyboard” on page 81 • “Miscellaneous parts” on page 86 • “AC adapters” on page 87 • “Screws” on page 87 • “Power cords” on page 88 Note: Each FRU is available for all types or models, unless specific types or models are specified. Attention: Do not attempt to replace an FRU on your own. If an FRU is damaged, contact a Lenovo authorized servicer or a marketing representative for replacement or repair. Only qualified technicians can inspect or repair this product.

  • Page 78: Overall

    G41-35/G51-35 Hardware Maintenance Manual Overall G41-35...
  • Page 79 Lenovo G41-35/G51-35 G51-35...
  • Page 80 90205216 ● Power Board L G41-35 5C50J22789 ● Power Board L G51-35 5C50J22864 ● MB L G41-35 NOK A4-7210 DIS 2G 5B20J22793 ● MB L G41-35 WIN A4-7210 DIS 2G 5B20J22842 ● MB L G41-35 NOK A4-7210 UMA 5B20J22893 ●...
  • Page 81 RAM, DDR3L 1600 8GB, RMT3160ME68FAF-1600 8GB DDR3L 11202450 ● ● 1600 RAM, DDR3L 1600 8GB, MT16KTF1G64HZ-1G6E1 8GB 11201304 ● ● DDR3L 1600 USB&Audio Board L G41-35 5C50J22838 ● USB&Audio Board L G51-35 5C50J22917 ● WLAN, Cbt BCM43162 1x1AC+BT4.0 PCIE M.2 WLAN V2 SW10A11586 ● ●...
  • Page 82 G41-35/G51-35 Hardware Maintenance Manual Table 4. Parts list—Overall (continued) G41- G51- No. FRU FRU no. Fan L G41-35 5F10J22858 ● ● Hard disk drive, 500G 5400rpm, ST500LT012 6G 7mm 5.4K 16200383 ● ● 500G HDD Hard disk drive, 500G 5400rpm, WD5000LPCX-24C6HT0 6G 16200395 ●...

  • Page 83: Lcd Frus

    Lenovo G41-35/G51-35 LCD FRUs In Lenovo G41-35/G51-35, there are following types of LCDs. • “14.0-in. HD LED” • “15.6-in. HD LED”...
  • Page 84 Table 5. Parts list—LCD FRUs G41- G51- No. FRU FRU no. ACLU1 LCD Bezel Black Texture L 90205105 ● LCD Bezel Black IMR L G41-35 5B30J22911 ● ACLU2 LCD Bezel Black Texture L 90205215 ● LCD Bezel Black IMR L G51-35 5B30J22829 ●...

  • Page 85: Keyboard

    Lenovo G41-35/G51-35 Keyboard Table 6. Parts list—Keyboard G41- G51- Language English 25214510 U.K. English 25214511 Italian 25214512 Spanish 25214513 Turkish 25214514 Thai 25214515 Portuguese 25214516 Latin 25214517 Canadian English&French 25214518 Korean 25214519 Traditional Chinese 25214520 Russian 25214521 French 25214522 German...
  • Page 86 G41-35/G51-35 Hardware Maintenance Manual Table 6. Parts list—Keyboard (continued) G41- G51- Language Arabic 25215204 Brazilian 25215205 Japanese 25215206 Dutch 25215207 Greek 25215208 Hebrew 25215209 Hungarian 25215210 Four Nordic countries 25215211 Liteon Belgian 25215212 Icelandic 25215213 Slovenian 25215214 Swiss 25215215 International English...
  • Page 87 Lenovo G41-35/G51-35 Table 6. Parts list—Keyboard (continued) G41- G51- Language English 25214725 U.K. English 25214726 Italian 25214727 Spanish 25214728 Turkish 25214729 Thai 25214730 Portuguese 25214731 Latin 25214732 Canadian English&French 25214733 Korean 25214734 Traditional Chinese 25214735 Russian 25214736 Japanese 25214741 French...
  • Page 88 G41-35/G51-35 Hardware Maintenance Manual Table 6. Parts list—Keyboard (continued) G41- G51- Language German 25214768 Arabic 25214769 Brazilian 25214770 Japanese 25214771 Dutch 25214772 Greek 25214773 Hebrew 25214774 Hungarian 25214775 Four Nordic countries 25214776 Sunrex Belgian 25214777 Icelandic 25214778 Slovenian 25214779 Swiss...
  • Page 89 Lenovo G41-35/G51-35 Table 6. Parts list—Keyboard (continued) G41- G51- Language Icelandic 25214808 Slovenian 25214809 Swiss 25214810 International English 25214811 Darfon ● Czechoslovakian 25214812 Bulgarian 25214813 Indian 25214814 French-Arabic 5N20G90518...

  • Page 90: Miscellaneous Parts

    G41-35/G51-35 Hardware Maintenance Manual Miscellaneous parts Table 7. Parts list—Miscellaneous parts G41- G51- FRU no. System miscellaneous parts: • ( a ) ACLU1 ODD Bracket 90205111 ● ● • ( b ) ACLU1 ODD Bezel Black L Tray-in 90205109 ●...

  • Page 91: Ac Adapters

    Lenovo G41-35/G51-35 AC adapters Table 8. Parts list—3-pin AC adapters G41- G51- Adapter, 45W, Chicony ADLX45NCC3A 20V2.25A adap(CMN) 36200610 ● ● Adapter, 45W, Liteon ADLX45NLC3A 20V2.25A adap(CMN) 36200606 ● ● Adapter, 45W, Delta ADLX45NDC3A 20V2.25A adap(CMN) 36200602 ● ● Adapter, 65W, Chicony ADLX65NCC3A 20V3.25A adap(CMN) 36200611 ●...

  • Page 92: Power Cords

    G41-35/G51-35 Hardware Maintenance Manual Power cords A Lenovo power cord for a specific country or region is usually available only in that country or region: Table 10. Parts list—power cords G41- G51- Region CCC 3PIN 145000600 • LINETEK PC323+RVV300/300+LS15 1m Argentina 3PIN 145000599 • LINETEK LS15+H03VV-F+LP39 1m Danmark 3PIN 145000598 • LINETEK LS15+H03VV-F+LP-38 1m Switzerland 3PIN 145000597 • LINETEK LS15+H03VV-F+LP-37 1m Brazil 3PIN 145000596 • LINETEK LS15 H03VV-F LP26A 1m...
  • Page 93 Lenovo G41-35/G51-35 Table 10. Parts list—power cords (continued) G41- G51- Region Israel 3PIN 145000563 • Longwell LP-41+H03VV-F+LS-18 1m UL 3PIN 145000562 • Longwell LP-30B+SPT-2 18AWG+LS-18 1m UK 3PIN 145000561 • Longwell LP-61L+H03VV-F+LS-18 1m Indian 3PIN 145000560 • Longwell LP-67+BIS+LS-18 1m Italy 3PIN 145000559 • Longwell LP-22+H03VV-F+LS-18 1m Korea 3PIN 145000558 • Longwell LP-486+KTLH03VV-F+LS-5 1m...
  • Page 94 G41-35/G51-35 Hardware Maintenance Manual Table 10. Parts list—power cords (continued) G41- G51- Region Brazil 3PIN 145000527 • VOLEX CH10S3+H03VV-F+VAC5S 1m Israel 3PIN 145000526 • VOLEX SI16S3+H03VV-F+VAC5S 1m CE 3PIN 145000525 • VOLEX M2511+HO3VV-F+VAC5S 1m 145500000 • lux 0031+H03VV-F 0.75/3C+0011 1m Europe 145500001 • lux 0033+H03VV-F 0.75/3C+0011 1m 145500002 • lux 0014+SPT-2 60°C 18/3C+0016 1m China 145500003 • lux 0036+RVV 300/300 0.75/3C+0002 1m...

  • Page 95: Notices

    Notices Notices Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult your local Lenovo representative for information on the products and services currently available in your area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any Lenovo intellectual property right may be used instead. However, it is the...

  • Page 96: Trademarks

    G41-35/G51-35 Hardware Maintenance Manual Any performance data contained herein was determined in a controlled environment. Therefore, the result obtained in other operating environments may vary significantly. Some measurements may have been made on development-level systems and there is no guarantee that these measurements will be the same on generally available systems. Furthermore, some measurements may have been estimated through extrapolation. Actual results...

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