About this manual ® This manual contains service and reference information for the following ThinkPad products. ThinkPad Edge E420s and S420 Machine Type (MT) 4401 Use this manual along with the advanced diagnostic tests to troubleshoot problems. Important: This manual is intended only for trained service technicians who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.
Electrical safety Observe the following rules when working on electrical equipment. Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents. Many customers have, near their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges.
– Use caution; do not become a victim yourself. – Switch off power. – Send another person to get medical aid. Safety inspection guide The purpose of this inspection guide is to assist you in identifying potentially unsafe conditions. As each machine was designed and built, required safety items were installed to protect users and service technicians from injury.
2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective. When handling ESD-sensitive parts: • Keep the parts in protective packages until they are inserted into the product. • Avoid contact with other people. •...
Laser compliance statement (multilingual translations) The laser compliance statements in this section are provided in the following languages: • English • Arabic • Brazilian Portuguese • French • German • Hebrew • Japanese • Korean • Spanish • Traditional Chinese Chapter 1 Safety information...
– “FRU identification for CTO, CMV, and GAV products” on page 29 Important: • Advise customers to contact the Lenovo Customer Support Center if they need any assistance in obtaining or installing any software fixes, drivers, and UEFI BIOS downloads. Telephone numbers for Lenovo Support are available at: http://www.lenovo.com/support/phone...
Dynamic Configure To Order (CTO) This provides the ability for a customer to configure a Lenovo solution from an eSite, and have this configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label, Product Entitlement Warehouse (PEW), eSupport, and the HMM will load these products as the 4-digit MT and 3-digit model, where model = “CTO”...
= a “fixed part number”, not “CTO” (Example: 1829-F1U). • PEW can be accessed at the following Web site: http://www.lenovo.com/support/site.wss/document.do?lndocid=LOOK-WARNTY Select Warranty lookup. Input the MT and the Serial number and the list of key commodities will be returned in the PEW record under COMPONENT INFORMATION.
Page 36
1. Click Product & Parts Detail and then follow the instructions on the screen to reach the Product and Parts Details page. 2. Click the Parts Detail tab to view the list of service parts. Using the HMM For key commodities (examples - hard disk drive, system board, microprocessor, LCD, and memory) Use the HMM as a backup to PEW and eSupport to view the complete list of FRUs at the MT model level.
“What to do first” on page 31 • “Checkout guide” on page 32 – “System supporting the Lenovo ThinkVantage Toolbox program and the PC-Doctor for DOS diagnostics program” on page 32 – “System supporting the Lenovo diagnostics programs” on page 36 •...
System supporting the Lenovo ThinkVantage Toolbox program and the PC-Doctor for DOS diagnostics program The section provides information about ThinkPad computers that support the Lenovo ThinkVantage Toolbox ® program and the PC-Doctor for DOS diagnostics program. Some descriptions might not apply to your particular computer.
Page 39
Configuration utility for DOS. The utility is available on the following Web site: http://www.lenovo.com/support Testing the computer Note: The PC-Doctor for DOS CD-R/CD-RW disc supports only test of internal optical disc drives (CD-RW, CD-RW/DVD Combo, and DVD Multi drives) on ThinkPad computers.
Page 40
The options on the test menu are as follows: Diagnostics Interactive Tests • Run Normal Test • Keyboard • Run Quick Test • Video • CPU/Coprocessor • Internal Speaker • System Memory • Mouse • Systemboard • Diskette • Video Adapter •...
Web site. To run this program, do as follows: Windows 7: Click Start ➙ Control Panel ➙ System and Security ➙ Lenovo - System Health and Diagnostics. Windows XP: Click Start ➙ All Programs ➙ ThinkVantage ➙ Lenovo ThinkVantage Toolbox.
Note: The Lenovo Solution Center program is available only on models preinstalled with the Windows 7 operating system. It also can be downloaded from http://www.lenovo.com/diagnose. To run Lenovo Solution Center, click Start ➙ Control Panel ➙ System and Security ➙ Lenovo - System Health and Diagnostics, and then follow the instructions on the screen.
F12 key. 3. Press the Tab key to switch to the Application Menu window. 4. Use the arrow keys to select Lenovo Diagnostics and then press Enter. The main screen of the UEFI diagnostic program is displayed.
• If you have created the bootable diagnostic medium on a USB device, do the following: 1. Attach the USB device to the computer. 2. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page 38, and check the power sources.
Voltage (V dc) Ground (20V) Note: Output voltage across pin 2 of the ac power adapter might be different from the one you are servicing. 3. If the voltage is not correct, replace the ac power adapter. 4. If the voltage is acceptable, do the following: •...
Page 46
Wire Voltage (V dc) +2.5 to +3.2 Black Ground • If the voltage is correct, replace the system board. • If the voltage is not correct, replace the backup battery. • If the backup battery discharges quickly after replacement, replace the system board. Hardware Maintenance Manual...
Service Web site: When the latest maintenance diskette and the system program service diskette become available, they will be posted on http://www.lenovo.com/support. Restoring the factory contents by using Recovery Disc Set When the hard disk drive (HDD) or solid state drive is replaced because of a failure, no product recovery program is on the new drive.
c. Select the CD/DVD drive as the 1st Boot Device. 2. Insert the Operating System Recovery Disc into the DVD drive. 3. Press F10 to save the ThinkPad Setup configuration changes. Follow the instructions on the screen to begin the recovery process. 4.
Attention: If the user HDP has been forgotten, check whether a master HDP has been set. If it has, it can be used for access to the hard disk drive. If no master HDP is available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the user or the master HDP, or to recover data from the hard disk drive.
1. Turn on the computer. 2. When the ThinkPad logo comes up, immediately press F1 to enter ThinkPad Setup. 3. Select Security, using the cursor directional keys to move down the menu. 4. Select Password. 5. Select Hard-disk x password, where x is the letter of the hard disk drive. A pop-up window opens. 6.
Hibernation mode In hibernation mode, the following occurs: • The system status, RAM, VRAM, and setup data are stored on the hard disk. • The system is powered off. If you have defined one of the following actions as the event that causes the system to go into hibernation mode, perform that action.
Numeric error codes Table 2. Numeric error codes Symptom or error (beeps, if any) FRU or action, in sequence 0187 System board. EAIA data access error-The access to EEPROM is failed. (two short beeps) 0189 System board. Invalid RFID configuration information area—The EEPROM checksum is not correct.
If the LCD you are servicing has two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.
Page 54
2. Visually check each FRU for damage. Replace any damaged FRU. 3. Remove or disconnect all of the following devices: a. Non-ThinkPad devices b. Printer, mouse, and other external devices c. Battery pack d. Hard disk drive e. External diskette drive or optical drive f.
Page 56
Table 6. Status indicators (continued) Indicator Meaning Sleep (standby) The illumination dot in the ThinkPad logo on the outer lid of the computer and on the status palm rest works as a system-status indicator: it shows whether the computer is in sleep (standby), hibernation, or normal model.
Page 58
Table 7. Special keys (continued) Description Special key Wireless radio control Enables or disables the built-in wireless networking features. If you press this key, a list of (F9) wireless features is displayed. You can quickly change the radio state of each feature in the list. Notes: If you want to use this button to enable or disable the wireless features, the following device drivers must be installed on your computer beforehand: •...
CRU; and (2) you may be charged for the replacement CRU if Lenovo does not receive the defective part within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full details.
If you replace the system board, you must restore the serial number of the system unit to its original value. Before replacing the system board, save the original serial number by doing the following: 1. Install the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later, and restart the computer.
When you replace the system board, you must set the UUID on the new system board as follows: 1. Install the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later, and restart the computer. 2. From the main menu, select 4. Assign UUID. A new UUID is created and written. If a valid UUID already exists, it is not overwritten.
If the computer you are servicing has the SIM card, remove it before you start the servicing. After you finish the servicing, make sure that you insert the card back into the slot firmly. 1010 ExpressCard blank bezel and Media Card blank bezel Removal steps of ExpressCard blank bezel When you press the ExpressCard blank bezel , it pops out...
Page 65
Removal steps of Media Card blank bezel When you press the Media Card blank bezel , it pops out When installing: Make sure that the bezel is correctly oriented as shown in the following figure. Chapter 8 Removing and replacing a FRU...
1020 Hard disk drive or solid state drive assembly Attention: • Do not drop the drive or apply any physical shock to it. The drive is sensitive to physical shock. Improper handling can cause damage and permanent loss of data. •...
Step Screw (quantity) Color Torque M2 × 4 mm, flat-head, nylon-coated (4) Black 0.181 Nm (1.85 kgfcm) 1030 Keyboard For access, remove “1020 Hard disk drive or solid state drive assembly” on page 60. Removal steps of keyboard Step Screw (quantity) Color Torque M2 ×...
Installation of the keyboard When installing the keyboard, do as follows: 1. Attach the connectors. 2. Attach the keyboard so that the keyboard edges are under the frame as shown in the following figure. 3. Secure the keyboard by tightening the screws from the bottom side of the computer. 1040 Top case assembly For access, remove “1020 Hard disk drive or solid state drive assembly”...
Page 70
Removal steps of top case assembly Torque Step Screw (quantity) Color M2 × 3 mm, wafer-head, nylon-coated (8) Black 0.181 Nm (1.85 kgfcm) M2 x 2 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) Note: Screw is located under the hard disk drive, you have to remove the hard disk drive first to remove screw Hardware Maintenance Manual...
1050 Backup battery For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 • “1030 Keyboard” on page 61 • “1040 Top case assembly” on page 63 Removal steps of backup battery DANGER Use only the battery specified in the parts list for your computer.
1060 Speaker assembly For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 • “1030 Keyboard” on page 61 • “1040 Top case assembly” on page 63 • “1090 Battery pack” on page 68 Removal steps of speaker assembly When installing: Make sure that the connector is attached firmly.
When installing: Make sure that the connector is attached firmly. 1080 Touch pad 1080 Touch pad For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 • “1030 Keyboard” on page 61 •...
Important notice for replacing a battery pack: • Lenovo ThinkVantage Toolbox or Lenovo Solution Center (in Windows 7) has an automatic battery diagnostic that determines if the battery pack is defective. A battery pack FRU should not be replaced unless this diagnostic shows that the battery is defective.
1100 Optical drive or travel cover For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 • “1030 Keyboard” on page 61 • “1040 Top case assembly” on page 63 •...
1110 DIMM Removal steps of DIMM (upper slot) For access, remove “1030 Keyboard” on page 61. When installing: Insert the notched end of the DIMM into the socket. Press the DIMM in firmly, and pivot it until it snaps into place. Make sure that it is firmly fixed in the slot and does not move easily. Removal steps of DIMM (bottom slot) For access, remove these FRUs in order: •...
When installing: Insert the notched end of the DIMM into the socket. Press the DIMM in firmly, and pivot it until it snaps into place. Make sure that it is firmly fixed in the slot and does not move easily. 1120 PCI Express Mini Card for wireless LAN For access, remove “1030 Keyboard”...
Step Screw (quantity) Color Torque Black 0.181 Nm M2 × 4 mm, wafer-head, nylon-coated (2) (1.85 kgfcm) When installing: Plug the gray cable into the jack marked MAIN or M, and the black cable into the jack marked AUX or A on the card. Note: In models with a wireless LAN card that has three antenna connectors, plug the gray cable (MAIN) into the jack marked TR1, the white cable (third) into the jack marked RO or TR3, and the black cable (AUX) into the jack marked TR2 on the card.
Removal steps of PCI Express Mini Card for wireless WAN Remove the screws . Then remove the antenna RF connectors When installing: Plug the orange cable into the jack marked MAIN, and the blue cable into the jack marked AUX on the card. Step Screw (quantity) Color...
Page 80
• Do not drop the drive or apply any physical shock to it. The drive is sensitive to physical shock. Improper handling can cause damage and permanent loss of data. • Before removing the drive, have the user make a backup copy of all the information on it if possible. •...
1140 Bluetooth daughter card For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 • “1030 Keyboard” on page 61 • “1040 Top case assembly” on page 63 • “1090 Battery pack” on page 68 Removal steps of bluetooth daughter card Step Screw (quantity)
Torque Step Screw (quantity) Color M2 × 4 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) 1160 System board assembly and fan assembly Important notices for handling the system board: When handling the system board, bear the following in mind. •...
Page 83
• Avoid rough handling of any kind. • At every point in the process, be sure not to drop or stack the system board. • If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a corrugated conductive surface.
When installing: Make sure that the connectors are attached firmly. Removal steps of fan assembly Torque Step Screw (quantity) Color M2 × 4 mm, wafer-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) 1170 DC-in sub card For access, remove these FRUs in order: •...
Page 85
Removal steps of DC-in sub card Applying labels to the base cover The new base cover FRU is shipped with a kit containing labels of several kinds. If the Windows Certificate of Authentication label (COA) is attached to a part that is replaced, return the old part with the label attached to the customer, or provide a letter to the customer stating what the label was originally on the system and what the label part number, serial number, and product key were.
1180 LCD unit For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 • “1030 Keyboard” on page 61 • “1040 Top case assembly” on page 63 • “1090 Battery pack” on page 68 Removal steps of LCD unit Step Screw (quantity)
2010 LCD bezel assembly For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 • “1030 Keyboard” on page 61 • “1040 Top case assembly” on page 63 • “1090 Battery pack” on page 68 •...
When installing: Make sure that all the latches are attached firmly. Then secure the bezel with the screws. 2020 Integrated camera For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 •...
2030 Hinges For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 • “1030 Keyboard” on page 61 • “1040 Top case assembly” on page 63 • “1090 Battery pack” on page 68 •...
2040 Wireless LAN antenna assembly, wireless WAN antenna assembly, and LCD rear cover assembly For access, remove these FRUs in order: • “1020 Hard disk drive or solid state drive assembly” on page 60 • “1030 Keyboard” on page 61 •...
Page 92
Cable routing: When you install the antenna assembly, route the cables as shown in the following figure. 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. : Wireless LAN AUX antenna (black) : Wireless WAN AUX antenna (blue) : Wireless WAN MAIN antenna (orange)
Chapter 9. Locations This chapter presents the location of the ThinkPad Edge E420s and S420 features and hardware components. Front view Built-in microphones Integrated camera Built-in stereo speaker Power switch Security keyhole Fan louvers (right) HDMI connector Combo audio jack...
Rear view Sleep (standby) status indicator Media Card Reader slot Optical drive eject button Optical drive Power jack indicator Power jack Monitor connector USB/eSATA combo connector Ethernet connector SIM card door Fan louvers (rear) : For the description of the indicator, see Chapter 5 “Status indicators” on page 49. Bottom view Hard disk drive (HDD) or solid state drive Emergency reset hole...
CRU, Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request. You may find a list of CRUs in the publications that ship with your product or at http://www.lenovo.com/CRUs. You may be required to return the defective part that is replaced by the CRU.
Keyboard Table 9. Parts list—Keyboard Language FRU no. Arabic 04W0805 04W0769 Belgian 04W0806 04W0770 Brazilian Portuguese 04W0804 04W0768 Bulgarian 04W0807 04W0771 Canadian French (058) 04W0802 04W0766 Canadian French (Acnor) 04W0801 04W0765 Czech 04W0808 04W0772 Danish 04W0809 04W0773 Dutch 04W0819 04W0783 Finnish, Swedish 04W0826 04W0790...
Table 9. Parts list—Keyboard (continued) Language FRU no. 04W0800 63Y0213 U.S. English U.S. English (International, with a Euro symbol) 04W0830 04W0794 Miscellaneous parts Table 10. Parts list—Miscellaneous parts FRU no. Screw kit 04W1753 N System miscellaneous kit 04W1752 N AC power adapters Table 11.
limitation, if a model came with Windows XP Professional preinstalled from the factory, but has either a Windows 7 or Windows Vista COA affixed to the system, that model is eligible only for recovery DVDs that match the operating system specified on the COA. Windows XP Professional is preinstalled as the operating system in the following models: •...
Table 17. Parts list—Windows 7 Home Basic (64 bit) recovery DVDs Language CRU ID Arabic 04T3345 Brazilian Portuguese 04T3346 French 04T3349 Indian English 04T3348 Portuguese 04T3350 Russian English 04T3351 Russian 04T3352 Serbian-Latin 04T3354 Simplified Chinese 04T3347 Spanish 04T3353 Turkish 04T3355 US English 04T3356 Windows 7 Home Premium (32 bit) DVDs...
Table 19. Parts list—Windows 7 Home Premium (64 bit) recovery DVDs (continued) Language CRU ID Greek 04T3366 Hebrew 04T3368 Hungarian 04T3369 Japanese 04T3370 Korean 04T3371 Polish 04T3372 Portuguese 04T3373 Romanian 04T3374 Russian 04T3375 Serbian-Latin 04T3378 Simplified Chinese 04T3362 Slovak 04T3376 Spanish 04T3377 Traditional Chinese...
USB floppy diskette drive for maintenance diskette 05K9283 USB floppy diskette drive tool kit 27L3452 Test card for integrated Smart Card 42W7820 — LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later Note: Download the file from the following Web site: http://www.lenovo.com/support Chapter 10 Parts list...
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.
Electronic emissions notices For electronic emission information on Class B digital devices, refer to the corresponding information in the User Guide. Trademarks The following terms are trademarks of Lenovo in the United States, other countries or both: Active Protection System Lenovo ThinkPad...
Page 114
Part Number: 0A60439_03 (1P) P/N: 0A60439_03 *0A60439_03*...