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Step 2.
Press the power button and use a paper clip or similar objects to press and hold the recovery
button in the emergency reset hole to enable the recovery mode.
Step 3.
Press Ctrl + D when the screen of recovery mode is displayed. Then use a paper clip to press and
hold the recovery button.
Note: The system reboots automatically and transits to developer mode.
Step 4.
Connect the prepared USB storage drive to the Chromebox.
Step 5.
Press the power button and use a paper clip to press and hold the recovery button.
Step 6.
To unlock the device, either press any key within 3 seconds to show the following menu, and then
press E.
Step 7.
Then, scan the QR code to follow the on-screen instructions when the screen is displayed and
enter the authorization code to install RMA shim.
Step 8.
Or use a screw to short the onboard R10 Write-Protect pads. Ensure that the R10 Write-Protect
pad has been short-circuited to unlock the device. Then, press I to install RMA shim.
Notes:
• Remove the system fan and heatsink before you short the R10 write-protect pads. For the
removal steps, see System fan and heatsink
• If the device fails to unlock, go back to step 1.
Step 9.
The RMA shim process begins automatically.
Step 10. When OK is displayed on the screen, remove the USB repair shim from the Chromebox and store it
in a safe place.
Step 11. Follow the on-screen instructions to start the Required Tests.
Step 12. Start the optional operation.
Note: If the Optional Tests detects a defective component, turn off the Chromebox, detach the ac
power adapter, and then replace the defective component.
Step 13. Follow the on-screen instructions to start the GRT.
If the tests finish successfully, all data stored on the Chromebox is deleted and the Chromebox is
turned off. If the GRT fails, it might result from hardware identity (HWID) mismatch and write-
protect malfunction. Use the following information to identify problems.
Problem
HWID mismatch
Write-protect
malfunction
32
ThinkCentre M60q Chromebox / M60q Chromebox Enterprise Hardware Maintenance Manual
Description
A set of valid hardware identities (HWIDs) is provided by Google. Google logs
the exact hardware combination into a Chromebox and creates an HWID. The
HWID is used for the following purposes:
• Auto-update new patches and software for the lifetime of the Chromebox
• Reset the Chromebox to factory settings
HWID mismatch can be caused by using unauthorized or missing parts. If the
write-protect function is not turned off before recovering the Chromebox with
the USB repair shim, it can also cause HWID mismatch.
The Chromebox system cannot be finalized until the write-protect function is
turned on.
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