⚠
warning HP
Error Code Monitor video cable disconnected
The monitor’s video signal is lost because the cable was disconnected or incorrectly plugged in.
? What Causes This
Improperly connected video cables, not properly connecting while computer power off.
✓ How to Fix It
Ensure proper connections for other cables like display input. Make sure to connect the cables with the computer turned off and later turn on both systems properly.
Source: page 70 of the official manual
From the manual
This error code appears in:
HP Z27 27 Inch 4K Uhd Display