!!
critical HP
Error Code LED flashes Red four times and then White two times
Processor thermal protection due failure or blockage in fan.
? What Causes This
Blocked air intakes, malfunctioning processor cooler fans (or their connections).
✓ How to Fix It
- Check for airflow clearances near vents and fan operation.
- Validate proper installation of heat sink and clean if clogged; replace faulty fans.
Source: page 79 of the official manual
From the manual
This error code appears in:
HP Prodesk 400 G3 Desktop Mini PC