Lenovo 20QT, Hardware Maintenance Manual, Page: 46 / 115

2. Download the proper diagnostic app and install it on your smartphone.
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).
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P1 Gen 2, X1 Extreme and X1 Extreme 2nd Hardware Maintenance Manual