Doesnt turn on anymore.

This sounds like a power suply issue. If the product is under warranty get it replaced, otherwise contact tech support.

this is so common in lcd monitors, its the power suply board.... most likely a capacitor.. so type a model# into google following the words "power suply" it will probably be close to $50-$60... thats better than buying a new one

hope this helps you

go to control panel then power option then change setting to TURN OF DISPLAY "NEVER"

this must be a electricity prob you should voltage stabilizer

mnk1001, Possible Failure of internal "switch-mode-power-supply"/ "CCFL inverter supply" of E2200HD. Will need to investigate to see if SMPS is in emergency shutdown mode. Please post back if you find out root cause of failure. 12fixlouie

it seems that there is a problem in the lcd back light or may be in power supply section

Check the power regulator AS431A

change your power cable.
also check your power suply and earthing.

That have to do some servicing in the power section at the main board.

There could be a number of causes. Do you hear any beeps when the computer starts up? Try seating all the chips in the motherboard. That means, apply pressure to each individual chip on the motherboard with your finger or thumb. The goal is to make sure each chip is securely attached to the board. Sometimes, heat or new h/w installs partially "pop" some of the chips out of the motherboard - causing the circuitry to be disconnected...