Use The Usb Repair Shim - Lenovo 10e Chromebook Tablet Hardware Maintenance Manual

Use the USB repair shim

Step 1. Tap in the system tray to shut down the Chromebook.
Step 2. Press the power button, and the two ends of the volume button together to enter the recovery
mode.
Step 3. Press the two ends of the volume button together, and then the Chrome OS recovery menu is
displayed. Use the two ends of the volume button to navigate and the power button to select
Confirm Disabling OS Verification.
Step 4. After the Chromebook enters the developer mode, wait 30 seconds for the Chromebook to restart.
Step 5. Depart the LCD unit from the base cover assembly (see "1010 LCD unit and LCD cable" on page
34) until the pins are exposed. Short-circuit the pins on the system board and keep them short-
circuited until the image is installed.
Step 6. Connect the Chromebook to a conventional keyboard through a compatible USB dongle. Press
Ctrl + Alt + F2 to open the Developer Console. Type root to log in, and then type enable_dev_usb_
boot to enable USB booting.
Note: If the Chromebook is connected to a Keyboard Folio, press Ctrl + Alt +
Developer Console.
Type reboot to restart the Chromebook.
Step 7.
Step 8. Connect the prepared USB repair shim to the Chromebook. After the OS verification screen is
displayed, press Ctrl + U. The Chromebook will install the image automatically.
Step 9. After the process is completed, press Enter to restart the Chromebook.
Step 10. Remove the USB repair shim from the Chromebook and reinstall the LCD unit.
Step 11. Follow the on-screen instructions to start the FFT.
Note: If the FFT detects a defective component, turn off the Chromebook, detach the ac power
adapter, and then replace the defective component.
Step 12. Start the RunIn and FAT (this is an optional operation).
Step 13. Follow the on-screen instructions to start the GRT. If the tests finish successfully, all data stored on
the Chromebook is deleted and the Chromebook is turned off. If the GRT fails, they might result
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Lenovo 10e Chromebook Tablet Hardware Maintenance Manual
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