My hp monitor is totally black it was working last night. i tried to unplug and replug it in and it came on for a few seconds then went black again

The monitor power supply board probably die,that what happening.That the board where the power A/C cord plug into it.Most common on a died or a dead power supply board are dead capacitors components parts.Tries check the power supply board very carefully see if u see any capacitors parts cylinder heads are bulging up.U know basic electronic and have all the tools and can do basic soldering works.Just replaced all these dying capacitors components parts that have it cylinder heads bulging up in the power supply board.Than the monitor should have power again and work.If the monitor look fine and have no dying or dead capacitors components parts in the power supply board that mean the power supply board it have dead and fried many of it components this probaly beyond repair for a basic knowledge of a electric tech hobbiest trying to do repair work for the power supply board.Try website like Ebay.com buy a whole new refurbish power supply board for the replacement it best idea.

A lot of time people have the impression that the monitor is not working when in fact the computer is not booting its lighting up but nothing else so its stays on a black screen.


One way to know is by opening your speakers or plugging head phones, if you hear windows open or any windows sound the problem is the screen.

You can also unplug the screen from the pc and turn the screen on most of the time the screen while show a disconnected warning on the screen if that comes up the computer is defective.