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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
0001: Reset error (platform reset not de-asserted)
0002: Internal bus error
0281: General embedded controller error
0282: Memory module error
0283: PCI resource error
0284: TCG-compliant functionality-related error (might be
the BIOS code validation failure)
0285: TCG-compliant functionality-related error (might be
the TPM initialization failure)
0286: Integrated graphics error
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ThinkPad L14 Gen 2 and ThinkPad L15 Gen 2 Hardware Maintenance Manual
Solutions
1. Remove the ac power adapter and the removable
battery if your computer has one. Then, reset the
computer by doing one of the following:
• For models with the emergency-reset hole,
insert a straightened paper clip into the
emergency-reset hole. Wait for one minute.
Then, reconnect all power resources and restart
the computer.
• For models without the emergency-reset hole,
press and hold the power button for about
seven seconds. Then, reconnect to all power
resources and restart the computer.
2. If step 1 does not work, replace the system board
(service provider only).
Replace the system board (service provider only).
Replace the system board (service provider only).
1. Reinstall or replace the memory module.
2. If step 1 does not work, replace the system board
(service provider only).
1. Remove PCIe devices (the M.2 card, PCIe card,
and so on) (service provider only).
2. If step 1 does not work, replace the system board
(service provider only).
Replace the system board (service provider only).
Replace the system board (service provider only).
Replace the system board (service provider only).
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