Chapter 2. Important Service Information; Strategy For Replacing Frus; Important Notice For Replacing A System Board - Lenovo ThinkPad X1 Hardware Maintenance Manual

Chapter 2. Important service information

This chapter introduces following important service information that applies to all machine types supported
by this manual:
• "Strategy for replacing FRUs" on page 19
– "Important notice for replacing a system board" on page 19
– "How to use error message" on page 20
• "Strategy for replacing FRUs for CTO, special bid model, and standard models" on page 20
– "Product definition" on page 20
– "FRU identification" on page 20
Important:
• Advise customers to visit the Lenovo
customers can view the software fixes, download the drivers, and see the instructions for installing the
drivers. For additional assistance, customers might call the Lenovo Customer Support Center. Telephone
numbers for the Lenovo Support Center are available at:
http://www.lenovo.com/support/phone
• Service training documents, for example the videos that show the FRU removals or replacements, are
provided to Lenovo authorized service technicians. The training documents are available at:
http://www.lenovoservicetraining.com

Strategy for replacing FRUs

Before replacing parts:
Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before replacing any FRUs
listed in this manual.
After a system board is replaced, ensure that the latest UEFI BIOS is loaded to the system board before
completing the service action.
To download software fixes, drivers, and UEFI BIOS, go to http://www.lenovo.com/ThinkPad Drivers and
follow the instructions on the screen.
• If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the
original FRU before you continue.
• Some tablets have both a processor board and a system board. If you are instructed to replace either
the processor board or the system board, and replacing one of them does not correct 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 tablet 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.

Important notice for replacing a system board

Attention: When handling a system board:
• Do not drop a system board or apply any excessive force to it.
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Support Web site at http://www.lenovo.com/support. The
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