Monitor turns off after 2 seconds.

The HP is a flat screen monitor used with many desktop computers. When the LCD on your HP monitor goes white, it is an indication that your monitor's inverter board has gone bad. The inverter board is a small circuit board that transfers power from the monitor's main circuit board to the LCD screen. Replacing the inverter board means dismantling the HP monitor.

1. Power down your computer and unplug the HP monitor cable from the back of your desktop. Disconnect the power cable from the back of the monitor. Relocate the monitor to a flat work surface. Place the monitor with the screen facing downward.

2. Remove the Phillips-head screws from the monitor's base stand and from the back cover. Lift the base stand off of the monitor and remove the back cover. Peel away the foil from inside the monitor around the internal circuit board.

3. Locate the inverter board near the bottom of the monitor's casing. Unplug the power cables from either side of the inverter. Loosen the Phillips-head screws from the inverter board. Lift the old inverter out of the monitor's casing and set it aside.

4. Place the new inverter inside the monitor. Replace the Phillips-head screws and fasten it in place. Reconnect the power cables to the connectors on each side of the new inverter. Replace the foil around the outside of the main circuit board.

5. Replace the back panel and base stand, and their retaining Phillips-head screws

I hope you find it very helpful.
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This tv problems are those long board call the LCD inverter boards,it is dead.TV should have 1 or 2 long boards that call the LCD inverter boards it it dead,these 1 or 2 long LCD inverter boards only job are to provide a backlight to the tv LCD screen panel to have screen light produce a picture.Tries websites like Shojimmy.com,Ebay.com to buy those refurbihes 1 or 2 long LCD inverter boards for the replacment.

Tv turn itself off after 2-3 seconds the tv still audio voices?Yes,than the tv long board that call the LCD inverter board it is dead.Require change the tv long LCD inverter board,this board help the LCD screen panel to have a backlight to produced a picture or 2-3 seconds tv power died completely no power to tv all?Yes,than this problems the tv power supply board it is dying.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish long LCD inverter board or the tv power supply board for the replacement.

Ur tv have a dead 1 or 2 long board that call the LCD inverter boards.These 1 or 2 long LCD inverter boards job are to help the LCD screen panel to have a backlight to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy those 1 or 2 long LCD inverter boards for the replacement.

Now,the tv is turn on,the picture come on only for a few sec.than died,you still have sound left?Yes,than ur tv have 1 or 2 a long board call the LCD inverter boards is dead.These 1 or 2 long LCD inverter boards help the LCD picture screen panel to have a backlight to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy those 1 or 2 long LCD inverter boards for the replacement.

I assume that you already try this monitor on another PC to verify that the problem is in the monitor, in this case you need to open it up and inspect the fuse, transitors, solder connections on the power/inverter board, see failed Dell monitors here for guide: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further.

You need to verify that you do have 9~12vdc feeding the inverter board. Did you see the backlight turn on for a second? Worst case will be bad lamp.

Not sure If I am understanding this correctly, you are trying to connect a monitor to a monitor? I have never heard of that before. As far as I know you need a video card that has dual output to use dual monitors. I am not saying you can't do what I think you are saying but I never heard of that before. Also on a side note depending on the resolution and amount of colors your operating system is set on, you need a video card strong enough to drive both monitors.

HI. I had the same problem with mine. It would flash the screen on for a split second and then turn black, the whole time the power light remained green. Upon opening up the case, I pulled the combo power supply board/inverter board out for inspection. I noticed one of the capacitors had a bulge on top indicating it was bad. It was the the 680uf 25v capacitor. I desoldered it, and soldered in the new one. After hooking everything back up, bingo!! Monitor now works perfectly. I couldn't find an exact match to the capacitance locally, but I had a 1000uf 35v cap in my utility box. It worked fine as a replacement. You can usually go within 30 percent of tolerance and be alright. Just don't go under on capacitance or voltage. I hope this helps.

Sounds like you have a problem in the inverter board. When you shut off the monitor the powers is being shunted from the input but the inverter is still energized and thus florescent is still lit. Please keep in mind that the voltage at the inverter can be lethal, so if you plan to open it, please keep this in mind. You can try to open the case and look for a rectangular board with two set of connectors that contain two cables. This is the inverter board and there will be a warning attached. check to see if you have a solder bridge, if not on the inverter, check the power converter or interface. If this does not work, check ebay for the same monitor that is broken: I.E. damaged screen. you can swap the parts until the problem goes away. Good Luck, and do be careful!!!!