Chapter 2. Important Service Information; Strategy For Replacing Frus - Lenovo ThinkPad Edge E145 Hardware Maintenance Manual

Chapter 2. Important service information

This chapter presents the following important service information that applies to all machine types supported
by this manual:
• "Strategy for replacing FRUs" on page 19
– "Strategy for replacing a hard disk drive" on page 20
– "Important notice for replacing a system board" on page 20
– "How to use error codes" on page 20
• "Strategy for replacing FRUs for CTO, special bid model, and standard model" on page 20
– "Product definition" on page 20
– "FRU identification" on page 21
Important:
• Advise customers to contact the Lenovo
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
• System disassembly and reassembly videos that show the FRU removal or replacement procedures for
the Lenovo authorized service technicians are available at:
http://www.lenovoservicetraining.com/ion/

Strategy for replacing FRUs

Before replacing parts:
Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before you replace 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 you
complete the service action.
To download and install software fixes, drivers, and UEFI BIOS, do the following:
1. Go to
http://www.lenovo.com/ThinkPadDrivers.
2. Click Download Drivers & Software and then follow the instructions on the screen to reach the
Download Drivers and Software page.
3. Follow the instructions on the screen to download and install the necessary software.
Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs:
• If you are instructed to replace a FRU but the replacement does not correct 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
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 might 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.
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