!!
critical HP
Error Code Red LED 4 blinks every second followed by a 2 second pause
The system is experiencing power failure, commonly due to an overloaded power supply or bad connection.
? What Causes This
Power supply overload, loose connections or failure of the power supply unit (PSU).
✓ How to Fix It
- Inspect and tighten any loose power cables and connectors.
- Replace faulty components such as PSU if necessary.
- Contact support for further assistance with unstable conditions.
Source: page 4 of the official manual
From the manual
This error code appears in:
HP Elitedesk 800 G1 Small Form Factor PC