Chapter 2. Important Service Information; Strategy For Replacing Frus; Strategy For Replacing A Solid-State Drive - Lenovo ThinkPad X13 Yoga Gen 4 Hardware Maintenance Manual
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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
– "Strategy for replacing a solid-state drive" on page 19
– "How to use error message" on page 20
• "Strategy for replacing FRUs for CTO, special-bid, and standard models" on page 20
– "Product definition" on page 20
– "FRU identification" on page 20
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:
https://pcsupport.lenovo.com/supportphonelist
• System Disassembly/Reassembly videos that show the FRU removals or replacements for the Lenovo
authorized service technicians are available in the following support site:
https://support.lenovo.com/us/en/solutions/ht505031
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
instructions on the screen.
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 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.
Strategy for replacing a solid-state drive
Always try to run a low-level format operation before replacing a solid-state drive. This will erase all data on
the drive. Ensure that the customer has a current backup of the data before you perform this task.
Attention: The drive startup sequence in the computer you are servicing might have been changed. Be
extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect
drive, data or programs can be overwritten.
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