Computer ,rebooting monitor don't display.!

[1Tommy30]

Computer on monitor don,t display says check video cable.

[WAWood]

@1Tommy30 

Of course the monitor does display; otherwise, you would get no error message on it.  It would simply be blank.

Thus, the problem is either the video cable (being bad or loose) or the integrated video chip on the motherboard.

As to the first, check both ends of the cable to ensure the connection is tight.  Loose cables can present this problem.  If both ends are connected properly, you would have to swap in another cable to see if this one is bad.

If the new cable presents the same problem, then it could be the video jack on the motherboard.  From the HP specs, it says you have two video jacks on the case: VGA and DisplayPort (DP).  Whichever port you are using now, you need to get a video cable to use the other port.  And if your monitor can't use that cable because it does not have the right video jack, you will have to get an adapter to connect your monitor to that cable.  You might also have to go into the BIOS settings in the PC and switch the output from one jack to another, although that usually is not necessary.

If you have to use an adapter with the cable, then you need to test this combination on another PC to confirm that it works, because adapters often do not work.