IBM X121E manual Retaining the Uuid, Reading or writing the ECA information, MTM on the rear label

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MTM on the rear label:

TTTT-CTO S/N SSSSSSS

Product ID on the rear label:

TTTT-MMM (Use this number when setting the serial number)

In the example, the Serial Number to be input is “1STTTTMMMSSSSSSS”.

Retaining the UUID

The Universally Unique Identifier (UUID) is a 128-bit number uniquely assigned to your computer at production and stored in the EEPROM of your system board. The algorithm that generates the number is designed to provide unique IDs until the year A.D. 3400. No two computers in the world have the same number.

When you replace the system board, you must set the UUID on the new system board by doing the following:

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 will not be overwritten.

Reading or writing the ECA information

Information on Engineering Change Announcements (ECA) is stored in the EEPROM of the system board. The electronic storage of this information simplifies the procedure to check if an engineering change has been previously applied to a computer.

To check what engineering changes have been previously applied to the machine, use the ECA information read/write function on the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later.

1.Insert the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later, and restart the computer.

2.From the main menu, select 6. Set ECA Information.

3.To read the ECA information, select 2. Read ECA/rework number from EEPROM and follow the instruction.

4.To read the box build date, select 5. Read box build date from EEPROM, and follow the instructions on the computer.

After an engineering change is applied to the machine, the EEPROM must be updated. Use the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later to update the EEPROM.

Note: Only the ECA number is stored in the EEPROM. The machine type of the ECA is assumed to be the same as the machine type of the machine that had the engineering change applied to it.

1.Insert the LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later, and restart the computer.

2.From the main menu, select 6. Set ECA Information.

3.To write ECA information, select 1. Write ECA/rework number from EEPROM, and follow the instruction.

4.To write box build date, select 4. Write box build date from EEPROM, and follow the instruction on the screen.

If the system board is being replaced, try to read the ECA information from the old system board and transfer the information to the new system board. If the system board is inoperable, this will not be possible.

Chapter 7. FRU replacement notices 47

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Contents ThinkPad X121e Hardware Maintenance ManualFirst Edition July Copyright Lenovo Contents Locations Iii About this manualThinkPad X121e Iv Hardware Maintenance Manual General safety Safety informationElectrical safety Safety inspection guide Grounding requirements Safety notices multilingual translationsSafety information Hardware Maintenance Manual Perigo Perigo Safety information Vorsicht Vorsicht Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Safety information Hardware Maintenance Manual Before replacing parts Important service informationStrategy for replacing FRUs Select Downloads & DriversDynamic Configure To Order CTO How to use error messageStrategy for replacing a hard disk drive Important notice for replacing a system boardGeneral Announce Variant GAV Using PEWFRU identification for CTO, CMV, and GAV products Hardware Maintenance Manual What to do first General checkoutCheckout guide Diagnostics using PC-Doctor for DOSFollowing are not covered under warranty Testing the computer Lenovo ThinkVantage Toolbox Diagnostics Interactive TestsHardware Info UtilityApplicable test FRU testsChecking the ac power adapter Power system checkoutInteractive Tests Mouse Pin Voltage V dcTerminal Voltage V dc Checking the battery packChecking operational charging Wire Voltage V dc Checking the backup batteryRestoring the factory contents by using Recovery Disc Set Related service informationHard disk password PasswordsPower-on password How to remove the power-on password Supervisor passwordHow to remove the hard-disk password Select Power-On PasswordSleep standby mode Power managementScreen blank mode Symptom-to-FRU index Hibernation modeNumeric error codes No-beep symptoms Error messagesBeep symptoms Intermittent problems LCD-related symptomsReseat the LCD connectors See important note for LCD-related symptomsUndetermined problems Hardware Maintenance Manual Indicator Meaning Status indicatorsHardware Maintenance Manual Key combination Description Speaker volume down keysFn key combinations For Windows Vista and Windows XP Key combination Description For WindowsScrew notices FRU replacement noticesExternal CRU statement to customers Plastic to plasticSelect 2. Read S/N data from Eeprom Retaining serial numbersRestoring the serial number of the system unit Reading or writing the ECA information Retaining the UuidMTM on the rear label Product ID on the rear labelHardware Maintenance Manual Before servicing ThinkPad X121e models Removing and replacing a FRUImportant notice for replacing a battery pack Battery packBottom slot cover Removal steps of memory modules Memory modulesHard disk drive or solid state drive assembly Step Screw quantity Color Torque PCI Express Mini Card for wireless LANRemoval steps of PCI Express Mini Card for wireless LAN Removal steps of PCI Express Mini Card for wireless WAN PCI Express Mini Card for wireless WANKeyboard Removal steps of keyboard Power sub card and microphone Top case assembly Removal steps of top case assembly Bluetooth daughter card Speaker assembly 1120 I/O board Important notices for handling the system board System board assembly, fan assembly, and backup batteryStep Screw quantity Color Torque CRT board assembly with cable DC-in sub card and base cover assembly Applying labels to the base cover Hardware Maintenance Manual LCD unit When installingM2.5 × 5 mm, wafer-head, nylon-coated Black 392 Nm Kgfcm Step Screw cap Screw quantity Color Torque LCD bezel assemblyRemoval steps of integrated camera Integrated cameraLCD panel, LCD cable, and hinges Removal steps of hinges Removing and replacing a FRU Hardware Maintenance Manual Front view LocationsBottom view Rear viewExternal CRU statement to customers Parts listOverall CRU FRU Overall FRU noCRU CRU CRU CRU CRU CRU FRU no. CRU ID LCD FRUsNo. FRU Overall FRU LCD FRU LCD FRU LCD Language FRU no Miscellaneous parts Ac power adaptersCountry or region FRU no Power cordsLanguage Recovery discs Windows XP Professional 32-bit DVDsWindows Vista Business 32-bit DVDs Windows 7 Home Premium 32-bit DVDs Windows 7 Home Basic 32-bit DVDsWindows 7 Professional 32-bit DVDs Windows 7 Home Premium 64-bit DVDs3051-CTO, 52x, 5Ax, 5Bx, 5Dx, 5Ex 3053-CTO 3055-CTO Windows 7 Professional 64-bit DVDsWindows 7 Ultimate 64-bit DVDs Windows 7 Ultimate 32-bit DVDsWindows 7 Starter 32-bit DVDs US English 04T1876Tool Common service tools103 Appendix A. NoticesTrademarks Electronic emissions noticesPage 0A96013