Using The Repair Shim - Lenovo ThinkPad 13 Hardware Maintenance Manual

Using the repair shim

To use the repair shim that you have created, do the following:
1. Turn off the write-protect function. See "Removing and reinstalling the write-protect screw" on page 22.
2. Attach the Lenovo USB-C 45W AC Adapter to the power connector on the computer. Press and hold
esc and the refresh key
recovery mode.
Note: After you turn off the write-protect function, the computer will be in Developer mode. In some
cases, the computer might not in Developer mode after you turn off the write-protect function (step 1). If
this happens, press and hold ctrl+d when the recovery screen is displayed, and then press enter. The
computer automatically restarts and enters Developer mode after several minutes. When prompted
to log on to the computer, turn off the computer. Then repeat step 2 to start the computer and enter
recovery mode.
3. When the recovery screen is displayed, connect the repair shim to an available USB connector of the
computer. The repair shim will update the firmware and image automatically. When prompted, choose
"i" to install the shim to the computer. When the update process finishes, the computer restarts and
enters the factory-test-image environment.
Note: The update process is automatic, and takes less than 10 minutes. Information about the update
status will be displayed on the computer screen during the process.
4. Remove the repair shim and put it in a safe place. The Runin test starts automatically and you will be
prompted for the Vital Product Data (VPD). If the VPD is already present, you may select a model name
and press esc to continue. If the write-protect function is still on, this step will not proceed.
Note: If the system board is replaced, you are required to reenter VPD, a 20-character machine type
and model (MTM) and serial number (SN) string. The string consists of the 7-digit machine type, 3-digit
model number, 8-digit SN, and is preceded by the characters "1S". You can find the MTM and SN
information on the bottom cover. To locate the MTM and SN label, see
"Applying labels to the base cover" on page 55.
If the MTM and SN information is already displayed, and match the numbers shown on bottom cover,
press esc to leave the values as they are.
5. The Final Assembly Test and Pack (FATP) section starts and then the stress test will run for 10 minutes.
This section includes the independent tests for each component. Follow the instructions on the screen
to start the tests. For information about the factory test items, see "Factory test items" on page 24.
6. If the factory test items reveal a defective component, turn off the computer, disconnect the Lenovo
USB-C 45W AC Adapter, and then replace the defective component. For information about the
replacement procedure, see Chapter 8 "Removing or replacing a FRU" on page 47.
7. Turn on the write-protect function. See "Removing and reinstalling the write-protect screw" on page 22.
8. Turn on the computer. The computer enters the factory-test-image environment again. It is
recommended that you run Stress Test and FATP Tests to ensure that new components function
correctly.
Note: It is not necessary to turn off the write-protect function again if additional components must
be replaced.
9. Run the GoogleRequiredTests. If the tests finish successfully, all data stored on the computer will be
deleted and the computer will be turned off. If the GoogleRequiredTests fails, refer to the common
mistakes that lead to GoogleRequiredTests failure in "Factory test items" on page 24.
Note: If any test is marked as failed, the final process cannot be completed. The final process can be
forced to end by pressing f. Do not force the final process to end when a component fails the test. Force
the final process to end only when the test has to be bypassed because it cannot be performed.
, and then press the power button to start the computer and enter
.
Chapter 2 Important service information
23