Chapter 3. Create and use a USB repair shim
What is a USB repair shim?
You can create a USB repair shim by writing a repair shim image to a USB storage drive. With the USB repair
shim, you can:
• Refresh the Chromebook system with the latest firmware.
• Diagnose problems and restore the system to factory settings.
Note: Before replacing any FRUs, use the USB repair shim to diagnose and identify problems.
When you use the USB repair shim to diagnose problems, the Chromebook enters the factory-test-image
environment and runs through factory test items.
Note: For the latest and detailed shim instruction, you can refer to the RMA Shim SOP from "Drivers &
Software" on
with Lenovo service credential.
https://support.lenovo.com
We strongly recommend that only trained technicians install the motherboard and shim. Customers
undertake self-repair at their own risk.
If customer requests the Self Repair Shim, please call Lenovo Customer Support Center. Go to
https://
for the latest phone numbers.
pcsupport.lenovo.com/supportphonelist
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