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You will have to open it up and get to the front bezel where the switch PCB assembly is screw down to the front bezel with VERY FRAGILE ribbon cable.
It may have broken plastic actuator on the button that makes contact with the TACTILE switch, the plastic assembly is not available as far as I know.
You may also want to inspect the caps.
Mohons, Get with the the program, will ya!! A video clip is worth a thousand words!! Try a search at YOUTUBE for the longer 6 to 10 minute video clips of "LCD monitor disassembly" and "LCD monitor repair". Here is a clue. "Parting the rear cover from the front plastic bezel is the hardest part." Go watch some video. You will be glad you did. And while your inside the monitor, why don't you check the "switch-mode-power-supply board for any swollen and/or leaky electrolytic filter capacitors! Do you have an OHM-Meter or DVM to check the switch? Bye for now. 12fixlouie
ps. could be SMPS is not "listening" to a GOOD switch!
Unplug the monitor from the power
Unplug the monitor from the computer
Plug the monitor back in.
Try turning it on.
DOES IT SAY "NO SOUCRE DETECTED" or soemthing like that???
if it DOESN'T it means there is something wrong with the computer.
if it DOES:
plug it back on to the computer, turn the computer power off.
Press and hold the power button on the computer for about 15 seconds.
Plug the computer back on.
Try turning the computer on.
if it's not turning on again there a problem either with your monitor cable, or the plug, or the video card plug. It is unlikely that your video card is broken if you hear no wired series of short and long beeps when you try turning the computer on.
Give us updates if you need more assistance
Under the the pedestal mount there are four screws. Once you've removed all the screws and the attached devices and cable (most importantly the power cable must be removed). Now you'll need a couple of flat diddle sticks (Radio Shack). Use these under the front bezel in between the the plastic front bezel and the metal rim of the internal screen. You'll actually be prying these two apart until the front plastic bezel snaps away from the rear plastic container. This won't happen if there are any screws left in it. Once you have all the plastic off, it's time to put on your anti static wrist strap and open up the metal containers.
Remove the base by the button release or 4 screws on the back. On the bottom of the monitor near the corners you will find two thin slots where you can insert a thin wide blade screwdriver or pry tool. Very gently pry the back from the bezel toward the center from both of these slots until the bottom is seperated, then contilue from the slots around the corners and up the sides until you have seperated the entire back from the bezel. Lay the monitor on the bezel and remove the back ( do not try to remove the bezel, at least not yet). Lift the tape that secures the ribbon cable from the bezel buttons to the logic board. Unplug the ribbon cable from the logic board by pulling on the connector (not the cable). Remove the cable covers from the back of the case (one has a screw, the other has a lift tab) and disconnect the lamp connectors and ribbon cable connectors (do not pull on the wires). remove four screws and lift the metal back from the screen.
I opened up an LCD by removing any screws you see on the backside and any that may be hiding under rubber buttons or stickers. Gently pry apart the frame from one side, center. Youll find out that the frame is clipped onto the rear part by integrated clips and youll ba able to see if you need inward pressure on the frame or base to unclip the frame portion. It is a "nervous time" procedure but the plastic is pretty tough and its not doing you any good as it sits, right? The power supply had one fuse and had the inverter intregrated into it. Mine was fine, but an SMT MOSFET component on the driver board was completely blown apart from voltage spike. Salvaged LCD and tossed.
Hey People! You Dont Need To Do Any Of This! Just Take Off The Power Button " Via A Small Screw You Insert In The Side Of The Power Button, then You Lift It Up And Take Off The Power Button" Then You Just Take The Edge Of A Tack Or Very Small Obect, insert it in the side, push down and it works! on and off like normal, and nothing complicated!