We have HP 22vc LED Monitor. Looks like there is button issue on this monitor. Sometimes when we turned the monitor off, we can not power on again if we press the power button.
We eventually found out a simple solution to make the power button back to work. But before we found out the solution, we tried to plug off and plug in the power cable, or click the power button longer time but all did not work.
How to make HP 22vc LED Monitor Power Button Work ?
The simple solution is: Just plug out your HDMI cable from computer, then press the monitor’s power button, now it turns on ! Then you plug in the HDMI cable to computer. Now everything work.