!
error HP
Error Code LED off when powered on
Indicates no power supply to the device or defective LEDs.
? What Causes This
Power failure or malfunction in LED indicators and associated circuits.
✓ How to Fix It
- Check cable connections between AC adapter/battery. - If external, check for physical damage. - Seek professional service if issue remains unresolved.
Source: page 20 of the official manual
From the manual
This error code appears in:
HP Elitebook 850 G3 Notebook PC