Ive just brought a hp pavilion p6551,plugged everything in and the monitor will not come on,ive also tried plugging into my television which is a lcd flatscreen,also tried ctrl alt and delete and still nothing

turned off , in the monitor. OSD setup.
cable fell off, (sound) or half plugged in.
sound turned own in PC or muted.
if you can't find out, why, try plugging in the monitor to another system and test it there, bingo, instant answers

Sounds like your video card is bad.

Sounds as if the backlight on that lcd monitor is bad. Parts aren't available for it so the monitor would have to be replaced.

try another monitor i re placed my cord and the graphics card and it didn't do me any good i replaced the monitor last and it works fine now. and my speakers pluged into the monitor the monitor i bought didn't have the port for speakers so now i need to get usb speakers so check it out. hope this helps

Simply get a AC to DC regulartor or a a DC adapter

Turn out the room lights and see if have a correct, but real dim, display. If you do, then you have a bad inverter or back light. If you don't, then you have a loose LCD cable connector, bad LCD cable or bad CD.
Ron

The magnets in the speakers will not effect the LCD monitor. If it is an LCD the problem in internal to the unit. You need skematics, trouble shooting skills, test equipment to repair this. If your menu can't fix it then your going to need lots of help with this one. Good luck

The monitor has a bad circuit shorting out it's power supply. Could also be faulty electrolytic capacitors in the power supply.
Good luck.

It could be one of three things, the first two could be an easy fix, the last one calls for a qualified repair person and could cost you

-first, The lcd cable assembly is loose, make sure it's seated properly. if problem still exists try to Disconnect the monitor cable from the computer and turn the monitor on leave it plugged in to the electric socket.it will display a diagnostic colorbar are the lines still there. if not your problem might be a cable or video card. if they are still there have a technician evaluate the monitor.

-second, The inverter card may need to be reseated

-last, The lcd has a thin line crack and needs to get replaced

It would be helpful to know about the inner workings of an lcd screen and how to access them. It shouldn't be to difficult if your computer savvy. I want to caution you about getting shocked. an lcd still has power stored in capacitors. you should be able to drain those capacitors by leaving the monitor on and unplugging it from the electrical plug wait 10 sec or until all lights go out on the monitor.

If none of this works then Your monitor is defective, and nothing you can do to fix it... Call where you got it from for a replacement

Check the cable wiring make sure all is plugged up right, If you have rebooted and it comes on ok than its the power cord. Remove and re-plug again