Creating the repair shim, Removing and reinstalling the write-protect screw – Lenovo ThinkPad Yoga 11e Chromebook User Manual
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Creating the repair shim
As a Lenovo service technician, do the following to create the repair shim:
1. Prepare a USB storage device with at least 8 gigabyte (GB) space. The required USB storage capacity
depends on the size of the recovery image.
Attention: Creating the repair shim will delete all data stored on the USB device. To avoid data loss,
make a backup copy of all the data that you want to keep.
2. Download latest version of the repair shim image from the Lenovo Support Web site at:
to create a repair shim. A Lenovo service credential is required.
Note: Ensure that you create the repair shim using the latest version of the repair shim image. Using an
earlier version might cause the repair process to fail.
3. Extract the downloaded file that contains the repair shim image.
4. Download the Win32 Disk Imager tool from .
5. Run the imager tool and follow the on-screen instructions to create the repair shim.
6. After using the repair shim, if you want to recover normal usage of the USB storage device, you will need
to format the device. Otherwise, you cannot use the storage space on the device.
Removing and reinstalling the write-protect screw
By default, the on-board Read-Only Memories (ROMs) are set as write-protected. Before refreshing the
Chromebook firmware, set the ROMs as unprotected by removing the write-protect screw on the system
board. After the refresh, reinstalling the write-protect screw.
To remove the write-protect screw, do the following:
1. Disable the built-in battery. See “Disabling the built-in battery” on page 46.
2. Disconnect the ac power adapter and all cables from the computer, and then remove the bottom
cover. See “1010 Bottom cover” on page 46.
3. Remove the battery. See “1020 Battery” on page 47.
4. Remove the hard disk drive bracket. See “1030 Hard disk drive bracket” on page 49.
5. Remove the keyboard. See “1050 Keyboard” on page 51.
6. Remove the keyboard bezel assembly. See “1060 Keyboard bezel assembly, speaker assembly,
media-card-reader board” on page 52.
7. Locate the write-protect screw on the system board as shown in the following illustration. To turn off the
write-protect function, remove the write-protect screw.
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Hardware Maintenance Manual