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Lenovo N24 Hardware Maintenance Manual

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Lenovo N24
Hardware
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  • Page 1 Lenovo N24 Hardware Maintenance Manual...
  • Page 2 “Notices” on page 63. First Edition (April. 2017) © Copyright Lenovo 2017. All rights reserved. LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No.

  • Page 3: Table Of Contents

    Putting the computer to sleep or shutting it down ..........25 Putting your computer to sleep ......25 Shutting down the computer ......25 Lenovo N24 ..........26 Specifications ..........26 Status indicators ........... 28 Fn key combinations/Hotkeys....... 29 FRU replacement notices ......30 Screw notices ..........30...

  • 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...

  • 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 N24: • “General safety” on page 2 • “Electrical safety” on page 3 • “Safety inspection guide” on page 5 •...

  • Page 6: General Safety

    Lenovo N24 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.

  • 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.
  • Page 8 Lenovo N24 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.

  • Page 9: Safety Inspection Guide

    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.

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

    Lenovo N24 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.

  • 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 Lenovo N24 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 Lenovo N24 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 Lenovo N24 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

    Lenovo N24 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.
  • 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.

  • Page 20: Important Service Information

    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.

  • 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. •...

  • Page 22: Important Information About Replacing Rohs Compliant Frus

    FRU part numbers. Lenovo plans to transit to RoHS compliance well before the implementation date and expects its suppliers to be ready to support Lenovo’s requirements and schedule in the EU. Products sold in 2005 and 2006 will contain some RoHS compliant FRUs.

  • 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.

  • Page 24: What To Do First

    Lenovo N24 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.

  • Page 25: Power System Checkout

    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 N24” on page 26. Note: Noise from the AC adapter does not always indicate a defect.

  • Page 26: Checking Operational Charging

    Lenovo N24 Hardware Maintenance Manual 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 27: Related Service Information

    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 the recovery system.

  • Page 28: Passwords

    Lenovo N24 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 two power management modes: screen blank and sleep (standby). 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 N24

    • “FRU replacement notices” on page 30 • “Removing and replacing an FRU” on page 31 • “Locations” on page 52 • “Parts list” on page 54 Specifications The following table lists the specifications of the Lenovo N24: Table 1. Specifications Feature Description Processor •...
  • Page 31 Lenovo N24 Table 1. Specifications (continued) Feature Description ® Pre-installed • Windows 10 Pro (National Academic only) ® operating • Windows 10 Pro with Downgrade Facilitation (National system Academic only) ® • Windows 10 Pro • W10Home ETY NB 1drive •...

  • Page 32: Status Indicators

    Lenovo N24 Hardware Maintenance Manual Status indicators The system status indicators below show the computer status: Table 2. Status indicators AC power Indicator Symbol Indicator adapter Meaning status status The computer is in hibernation mode or turned off; The battery has more than 20% charge.

  • Page 33: Fn Key Combinations/Hotkeys

    Lenovo N24 Fn key combinations/Hotkeys The following table shows the function of each combination of Fn with a function key. Table 3. Fn key combinations Fn + PgUp: Activates the home key function. Fn + PgDn: Activates the end key function.

  • Page 34: 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: •...

  • Page 35: Removing And Replacing An Fru

    Lenovo N24 Removing and replacing an FRU This section presents exploded figures with the instructions to indicate how to remove and replace the FRU. Make sure to observe the following general rules: 1. Do not attempt to service any computer unless you have been trained and certified.

  • Page 36: 1010 Base Cover

    Lenovo N24 Hardware Maintenance Manual 1010 Base cover Figure 1. Removal steps of base cover Remove the screws 1 from the bottom. Step Screw (quantity) Color Torque M2.5 × 5.5 mm, Phillips head, nylok-coated (11) Black 2 kgf*cm Lower to Upper Use a plastic prying tool to aid in separation shown by arrows 2, 3, 4 and 5, then remove the base cover 6.
  • Page 37 Lenovo N24 Note: Applying labels to the base cover If you see any of the following labels on base cover, they need to be peeled off from the old base cover, and put on the new base cover. Win10 label...

  • Page 38: 1020 Battery Pack

    Lenovo N24 Hardware Maintenance Manual 1020 Battery pack For access, remove this FRU: • “1010 Base cover” on page 32 DANGER Only use the battery specified in the parts list for your computer. Any other battery could ignite or explode.

  • Page 39: 1030 Pci Express Mini Card For Wireless Lan

    FCC and IC regulations. Refer to “Table 5. Parts list—Overall” on page 56 for Lenovo part numbers for the approved modules. Figure 3. Removal steps of PCI Express Mini Card for wireless LAN Disconnect the two wireless LAN cables (black, gray) 1.
  • Page 40 Lenovo N24 Hardware Maintenance Manual Figure 3. 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.

  • Page 41: 1040 Io Board

    Lenovo N24 1040 IO Board For access, remove these FRUs in order: • “1010 Base cover” on page 32 • “1020 Battery pack” on page 34 Figure 4. Removal steps of IO board Detach the IO board connector in the directions shown by arrows 1 and 2.

  • Page 42: 1050 Touchpad Button Board

    Lenovo N24 Hardware Maintenance Manual 1050 Touchpad button board For access, remove these FRUs in order: • “1010 Base cover” on page 32 • “1020 Battery pack” on page 34 Figure 5. Removal steps of touchpad button board Peel off the tape 1.

  • Page 43: 1060 Speaker

    Lenovo N24 1060 Speaker For access, remove these FRUs in order: • “1010 Base cover” on page 32 • “1020 Battery pack” on page 34 Figure 6. Removal step of speaker Unplug the speaker connector in the direction shown by arrow 1. Release the speaker cable from the cable guides.

  • Page 44: 1070 Upper Case

    Lenovo N24 Hardware Maintenance Manual 1070 Upper case For access, remove these FRUs in order: • “1010 Base cover” on page 32 • “1020 Battery pack” on page 34 • “1030 PCI Express Mini Card for wireless LAN” on page 35 Figure 7.
  • Page 45 Lenovo N24 Figure 7. Removal steps of upper case (continued) Open the hinge in the direction shown by arrows 4. Rotate the upper case in the direction shown by arrow 5. Then remove the upper case.

  • Page 46: 1080 System Board

    Lenovo N24 Hardware Maintenance Manual 1080 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 47 Lenovo N24 Figure 8. Removal steps of system board (continued) Peel off the tape 3. Detach the keyboard connectors in the directions shown by arrows 4 and 5. Remove the screws 6. Step Screw (quantity) Color Torque M2.5 × 3 mm, Phillips head, nylok-coated (5)
  • Page 48 Lenovo N24 Hardware Maintenance Manual Figure 8. Removal steps of system board (continued) Remove the system board in the direction shown by arrow 7. Unplug the RTC battery connector in the direction shown by arrow 8, then remove the RTC battery..

  • Page 49: 1090 Lcd Cover

    Lenovo N24 1090 LCD cover For access, remove these FRUs in order: • “1010 Base cover” on page 32 • “1020 Battery pack” on page 34 • “1030 PCI Express Mini Card for wireless LAN” on page 35 • “1040 IO Board” on page 37 •...

  • Page 50: 1100 Pen Holder

    Lenovo N24 Hardware Maintenance Manual 1100 Pen holder For access, remove these FRUs in order: • “1010 Base cover” on page 32 • “1020 Battery pack” on page 34 • “1030 PCI Express Mini Card for wireless LAN” on page 35 •...

  • Page 51: 1110 Hinges

    Lenovo N24 1110 Hinges For access, remove these FRUs in order: • “1010 Base cover” on page 32 • “1020 Battery pack” on page 34 • “1030 PCI Express Mini Card for wireless LAN” on page 35 • “1040 IO Board” on page 37 •...
  • Page 52 Lenovo N24 Hardware Maintenance Manual Figure 11. Removal steps of hinges (continued) Release the two hinges in the direction shown by arrows 4.

  • Page 53: 1120 Camera Board, Sensor Board And Lcd Cable

    Lenovo N24 1120 Camera board, sensor board and LCD cable For access, remove these FRUs in order: • “1010 Base cover” on page 32 • “1020 Battery pack” on page 34 • “1030 PCI Express Mini Card for wireless LAN” on page 35 •...
  • Page 54 Lenovo N24 Hardware Maintenance Manual Figure 12. Removal steps of camera board, sensor board and LCD cable (continued) Unplug the connector in the direction shown by arrow 3. Remove the screw 4. Step Screw (quantity) Color Torque M2 × 2 mm, Phillips head, nylok-coated (1) Silver 3±0.3 kgf*cm...
  • Page 55 Lenovo N24 Figure 12. Removal steps of camera board, sensor board and LCD cable (continued) Remove the EDP cable in the direction shown by arrows j.

  • Page 56: Locations

    Lenovo N24 Hardware Maintenance Manual Locations Front and right-side view a Integrated camera b Built-in microphone c Wireless LAN antennas d Computer display e Power button f Novo button g System status indicators Note: For the description of each indicator, see “Status indicators” on page 28.

  • Page 57: Bottom And Left-Side View

    Lenovo N24 Bottom and left-side view a Speakers b Micro SD card slot c HDMI port d USB 3.0 port e AC power adapter jack...

  • Page 58: Parts List

    Lenovo N24 Hardware Maintenance Manual Parts list This section presents the following service parts: • “Overall” on page 55 • “LCD FRUs” on page 58 • “Miscellaneous parts” on page 59 • “AC adapters” on page 59 • “Screws” on page 59 •...

  • Page 59: Overall

    Lenovo N24 Overall...
  • Page 60 Lenovo N24 Hardware Maintenance Manual Table 5. Parts list—Overall No. FRU FRU no. See “Miscellaneous parts” on page 59. LCD unit (see “LCD FRUs” on page 58.) Upper Case ASM 3N 81AF W/KB US BK 5CB0P18543 Up Case ASM 3N 81AF W/KB CFEN BK...
  • Page 61 Lenovo N24 Table 5. Parts list—Overall (continued) No. FRU FRU no. TP Button Board 3N 80UR W/cable 5C50L76072 WLAN, Intel 7260 2x2AC+BT PCIE M.2 WLAN V2 20200552 WLAN, Intel 8265 2x2AC+BT PCIE M.2 WLAN NV SW10K97453 WLAN, Intel Snowfield Peak 2 8260 2*2ac+BT4.1 SW10A11646 PCIE Non-Vpro M.2 Combo...

  • Page 62: Lcd Frus

    Lenovo N24 Hardware Maintenance Manual LCD FRUs In Lenovo N24 , there are following types of LCDs. • “11.6-in. HD/FHD LED”...

  • Page 63: Miscellaneous Parts

    Lenovo N24 Table 6. Parts list—LCD FRUs No. FRU FRU no. LCD Bezel Screw Pad 3N 81AF 5R60P18568 LCD Module 3N 81AF W/TP/Bezel 5D10P18564 Pen Holder 3N 81AF BLK 5M20P18570 CAM 3N 81AF WIN10 1M front W/mic 5C20P18589 LVDS Cable 3N 81AF...

  • Page 64: Power Cords

    Lenovo N24 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—3-pin power cords 145000600 • LINETEK PC323+RVV300/300+LS15 1m Argentina 145000599 • LINETEK LS15+H03VV-F+LP39 1m...
  • Page 65 Lenovo N24 Table 10. Parts list—3-pin power cords (continued) Italy 145000559 • Longwell LP-22+H03VV-F+LS-18 1m Korea 145000558 • Longwell LP-486+KTLH03VV-F+LS-5 1m Australia 145000557 • Longwell LP-23A+LFC-3R+LS-18 1m Taiwan 145000556 • Longwell LP-71+VCTF+LS-33 1m Japan 145000555 • Longwell LP-54+VCTF+LS-18 1m Africa 145000554 •...
  • Page 66 Lenovo N24 Hardware Maintenance Manual Table 10. Parts list—3-pin power cords (continued) 145500002 • lux 0014+SPT-2 60 ̊ C 18/3C+0016 1m Thailand 5L60J33143 • lux 0014+H03VV-F 0.75/3C+0011 1m 145500000 • lux 0031+H03VV-F 0.75/3C+0011 1m Indian 145500004 • lux 0046+IS694 0.75/3C+0011 1m...

  • Page 67: Notices

    The result obtained in other operating environments may vary. Lenovo may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.

  • Page 68: Trademarks

    Lenovo N24 Hardware Maintenance Manual Trademarks Lenovo is a trademark or registered trademark of Lenovo in the United States, other countries, or both. Microsoft and Windows are trademarks of Microsoft Corporation in the United States, other countries, or both. Other company, products, or service names may be trademarks or service...

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