!!
critical HP
Error Code LED blinks 4 times
Processor thermal protection activated due to overheating or fan malfunctioning.
? What Causes This
Fan is blocked, heat sink improperly installed, or airflow issues in the system.
✓ How to Fix It
- Verify that cooling fans are operational and properly seated in the chassis.
- Check if the CPU heat sink is correctly attached to ensure proper heat dissipation.
Source: page 54 of the official manual
From the manual
This error code appears in:
HP Prodesk 600 G4 Small Form Factor PC