Most likely, its a power supply issue. Have fixed a couple of these by replacing bad capacitors on the power supply board. A bad capacitor will have the top bulging, not flat on top as it should be. The way to get the monitor apart is a little tricky. You will need to remove the screws around the top, sides, and bottom, Do Not remove screws on back in the middle. These screws hold the metallic pan that houses the power supply it's self. I used an orange pealer from Tupperware to pray the front face plate away from the back. You can use a screwdriver, if you don't mind a little marring on the face plate plastic. It's not easy removing the front face piece, lots of interconnecting plastic locks all.around the front face plate. Using your pry tool and pulling (you'll need to use a little muscle) to get the front off. Once face plate is loose, you'll notice the screen is connected to the power supply, one in the middle usually can be pulled and disconnected using your hand. I suggest taking pictures before removing the other wires holding the screen to the power supply. At this point, the front plate is removed, and the screws holding the the screen have been removed, wires disconnected, and power supply in view. Best of luck
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