No-Beep Symptoms - Lenovo ThinkPad L13 2-in-1 Gen 5 Hardware Maintenance Manual

Blinking patterns Error codes
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
0281: General embedded controller error

No-beep symptoms

Table 3. No-beep symptoms
Symptom or error
No beep, power-on indicator on, LCD blank, and no
POST.
No beep, power-on indicator on, and LCD blank during
POST.
The power-on password prompt appears.
Solutions
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).
1. Reconnect the display cable on both the
system board side and the computer
display side (service provider only) and
check the LCD panel.
2. If step 1 does not work, connect an
external display to your computer and
check the status (customer or service
provider).
• If the external display works, replace
the LCD panel (service provider only).
• If the external display does not work,
replace the system board (service
provider only).
Replace the system board (service provider
only).
FRU or action, in sequence
1. Run LCD Self Test.
2. Ensure that every connector is connected tightly and
correctly.
3. Reseat memory module.
4. Replace the system board.
1. Run LCD Self Test.
2. Reseat memory module.
3. Replace the system board.
A power-on password or a supervisor password is set.
Type the password and press Enter.
Chapter 4
.
Related service information
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