Lenovo Ideapad E490 Hardware Maintenance Manual page 47

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
0287: Discrete graphics error
0288: Computer display error
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E490 and R490 Hardware Maintenance Manual
Solutions
1. Remove the ac power adapter and the removable
battery if your computer has one. 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. Replace the system board (service provider only).
Replace the system board (service provider only).
Replace the system board (service provider only).
Reinstall or replace the memory module.
If the above solution does not work, replace the system
board (service provider only).
Remove PCIe devices (the M.2 card, PCIe card, and so
on) (service provider only).
If the above solution 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).
Reinstall or replace the discrete graphics card (service
provider only).
If the above solution does not work, replace the system
board (service provider only).
Reconnect the display cable on both the system board
side and the computer display side (service provider
only).
If the above solution does not work, replace the system
board (service provider only).