Lenovo 300e Chromebook 2nd Gen, Hardware Maintenance Manual

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If the system board is replaced, you are required to enter the VPD.
Note: The VPD is a 20 — character string.
Table 1. Combination of the 20 – character VPD
Preceding characters Machine type Model number SN
“1S”, 2 digits
7 digits 3 digits 8 digits
The MTM and SN can be found on the label attaching to the bottom cover.
Step 6. Follow the instructions on the screen to start the FATP Tests.
Step 7. If the factory test items reveal a defective component, turn off the computer, disconnect the ac
power adapter, and then replace the defective component.
Step 8. Re-enable the ROM write-protection by reinstalling the write-protection screw.
Step 9. Turn on the computer. The computer should starts to the factory-test-image environment again. It
is recommended that you run Stress Test and FATP Tests to ensure that new components function
correctly.
Step 10. 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 “Common
issues leading to GoogleRequiredTests fail” on page 25.
Note: If any test is marked as failed, the final process cannot be completed. The final process can
be forced to end by pressing the f key. 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.
After the repair process finishes, the built-in battery is disabled. The system is in a clean out-of-box state. In
order to turn on the computer, attach the ac power adapter to the power connector on the computer first. If
applicable, customers must re-enroll the system for enterprise enrollment.
Factory test items
When the computer restarts to the factory-test-image environment, factory test items will run automatically.
Table 2. Factory test items
Test item Description
Stress Test The Stress Test is designed to test how the system
functions under stress by running the maximum workload
applications. The Stress Test includes the test of memory,
microprocessor, and graphics card. The test takes about
10 minutes to finish.
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Hardware Maintenance Manual