HP Omen 45L won't connect to peripherals, won't even hard reset

[BenjaminDB1]

I have a HP Omen 45 L . It is almost half a year old. I have had problems with it as long as I had it. The problems have gotten worse lately. 

My computer will start up (and the RGB will light up), but won't make connection with my screen(s) or with my mouse. I used for the last half year a workaround. I just kept fiddling with the cables and restarting it by using the power button. But now the power button does no longer seem to work. It does nothing if I press it 15 seconds. I tried to do a hard reset, and that does not work either. I can't seem to be able to connect with my computer. I tried unplugging all unnecessary devices, I replaced the Display Cables. I looked online everywhere for an answer, and can't seem to find anything. Is there anyone here who can help me. 

Thanks in advance

[old_geekster]

@BenjaminDB1 , welcome to the Community.

I suggest that you test your power supply unit (PSU).  The symptoms that you described are consistent with a failing/failed PSU.

Please click the "Yes" button if my reply was helpful and "Accept as Solution" if your problem is Solved!!