3. Run the diagnostic app and place the smartphone near the computer.
4. Press the Fn key on your computer to emit the beep again. The diagnostic app decodes the beep error
and shows possible solutions on the smartphone.
The following section describes some beep errors and the corresponding solutions.
Note:
Do not attempt to service a product yourself unless instructed to do so by the Customer Support
Center or product documentation. Only use a Lenovo-authorized service provider to repair your product.
Error codes
Solutions
0001: Reset error (platform reset not de-asserted)
1. Remove all power resources: the ac power
adapter, and the coin-cell battery (service provider
only). Reset the computer by inserting a
straightened paper clip into the emergency-reset
hole. Wait for one minute. Then reconnect all
power resources.
2. Replace the system board (service provider only).
0002: Internal bus error
Replace the system board (service provider only).
0281: General embedded controller error
Replace the system board (service provider only).
0282: Memory module error
1. Reinstall or replace the memory module (service
provider only).
2. Replace the system board (service provider only).
0283: PCI resource error
1. Remove PCIe devices (the M.2 card, PCIe card,
and so on) (service provider only).
2. Replace the system board (service provider only).
0284: TCG-compliant functionality-related error (might be
the BIOS code validation failure)
Replace the system board (service provider only).
0285: TCG-compliant functionality-related error (might be
the TPM initialization failure)
Replace the system board (service provider only).
0286: Integrated graphics error
Replace the system board (service provider only).
0287: Discrete graphics error
1. Reinstall or replace the discrete graphics card
(service provider only).
2. Replace the system board (service provider only).
0288: Computer display error
1. Reconnect the display cable on both the system
board side and the computer display side (service
provider only).
2. Replace the system board (service provider only).
LCD-related symptoms
Important:
The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The
presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT
LCD technology, but excessive pixel problems can cause viewing concerns.If the LCD you are servicing has
two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more
visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.
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Summary of Contents for 20KE
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