Lenovo ThinkPad X1 Carbon Gen 12 Hardware Maintenance Manual page 40

• The LED indicator blinks continually until the computer turns off. If you need to interrupt the process,
press power button for a few seconds.
• Do not attempt to service a computer yourself unless instructed to do so by the Customer Support Center
or product documentation. Only use a Lenovo-authorized service provider to repair your computer.
Refer to the blinking patterns and error codes in the table below to solve your computer problems.
Blinking patterns Error codes
0001: Reset error (platform reset not de-
asserted)
0002: Internal bus error
0003: Non-Volatile Memory programming
error in system power circuit
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
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ThinkPad X1 Carbon Gen 12 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).
1. Reinstall or replace the discrete graphics
card (service provider only).
2. If step 1 does not work, replace the
system board (service provider only).