⚠
warning HP
Error Code LED flashes three times followed by white four times
Power failure or supply overload, system shutting down.
? What Causes This
Devices plugged in may be overloading the power supply; loose cable connections; incorrect voltage settings on the PSU.
✓ How to Fix It
- Disconnect all extra peripheral devices and plug back one by one to isolate problematic component.
- Verify secure fit between power cable and motherboard connection points.
- If necessary, switch voltage selector based on regional supply specifications.
Source: page 75 of the official manual
From the manual
This error code appears in:
HP Elitedesk 800 G4 Small Form Factor PC