Lenovo 20JD, User Manual, Page: 97 / 150

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,
removable battery, and coin-cell battery). If your
computer has a built-in battery, 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.
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).
Ethernet problems
• Problem : My computer cannot connect to the network.
Solution :
Ensure that:
– The Ethernet extension adapter is connected correctly.
The network cable must be securely connected both to the Ethernet extension adapter and to the RJ45
connector of the hub. The maximum allowable distance from the computer to hub is 100 meters. If
the cable is connected and the distance is within acceptable limits but the problem persists, try a
different cable.
– You are using the correct device driver. To install the correct driver, do the following:
1. Go to Control Panel, and ensure that you view Control Panel by Category.
2. Click Hardware and Sound ➙ Device Manager . If you are prompted for an administrator
password or confirmation, type the password or provide confirmation.
3. Double-click Network adapters to view all network adapters. If an exclamation mark ! is
displayed next to the adapter name, you might not be using the correct driver or the driver might
have been disabled.
Chapter 7
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Troubleshooting computer problems
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