Chapter 2. Important Service Information; Strategy For Replacing Frus; Strategy For Replacing A Hard Disk Drive, A Hybrid Drive, Or A Solid-State Drive - Lenovo ThinkPad P40 Yoga 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
– "Strategy for replacing a hard disk drive, a hybrid drive, or a solid-state drive" on page 19
– "Important notice for replacing a system board" on page 20
– "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 21
Important:
• If the computer is equipped with both a hard disk drive and an mSATA solid-state drive, do not use the
mSATA solid-state drive as a bootable device. The mSATA solid-state drive is designed and developed for
"cache" function purpose only.
• 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/Reassembly videos that show the FRU removals or replacements for the Lenovo
authorized service technicians are available in the following support site:
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 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/ThinkPadDrivers and
follow the 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 hard disk drive, a hybrid drive, or a solid-state
drive
Always try to run a low-level format before replacing a hard disk drive, a hybrid drive, a solid-state drive.
This will cause all customer data on the drive to be lost. Be sure that the customer has a current backup of
the data before doing this task.
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