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trixieb1, It's NOT going to sleep mode. Use warranty if possible!! If that not option you will need to read about "cold-cathode-fluorescent-lamps" and the voltage inverters that power them. Learn to do flashlight test when screen goes to black or blank n black!!! Read my fixya profile and those of other ccfl back-lit lcd monitor technicians. We already know what is wrong with your unit. And It is a VERY big problem for all LCD monitor manufacturers. Just do some reading before you do anything else. Good luck with the repair. 12fixlouie
right click on the desktop click on screen setup and click on sleep mode add 20 minutes to it, then right click on the desk top and go to properties choose 32 bit and 900 dpi and click ok see if that's better if it is click ok, need more info or that does not work just re-post a comment and I will get back to you..
You must go into the BIOS of you computer and turn off the sleep mode and also in windows. Disconnect the monitor and power it on without hooking it up to the computer. If the monitor turn on and is working , then hook it up to the computer and try with with the sleep controls off to see if it works correctly.If this works you must check the owners manuals of the motherboard and monitor for the correct operation of the sleep mode functions.Then reinstall the sleep mode operation and see if everything works correctly. If the monitor fails to work. Try the monitor on another computer and see if it will function. If all this fails to get the monitor working , then you will need to have the monitor tested in a service center to find the problem and have it repaired. You should also check your computer on another monitor just to maker sure you don not have a problem with the computer too. Hope this helps you with your problem.
Due to the power surge, it is highly possible that the monitor was given a boot by your computer on it's way out.
This will short out a very small transistor inside the monitor on the video board and in turn, then monitor cannot see that there is a signal so goes to sleep.
If you get brave enough to venture inside the screen, then check near the cable input. The transistors are only around 3mm and have 3 legs (two one side and one in the middle on the other).
If you find anything like that burnt (get a magnifying glass) then replacing the board is the easiest option. Just don't be tempted to wipe the board before you look at everything very closely, you may wipe away the tiny bit of evidence you are looking for.