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If you have Recovery CD's you can use that to recovery your computer for factory settings. If you do not have recovery Discs and Have not made any changes to the partition of the HDD since you purchased it try the following.
Turn off the device Turn on by pressing the power button Press Alt on the keyboard and keep tapping the F10 key immediately when you see the Acer logo. It will bring you to the Recovery screen and you just need to follow the instructions on the screen to complete the recovery.
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Are you sure the monitor is plugged into the correct port? Also, check the monitor cable for bent pins. A small move shouldn't make this kind of difference. Eliminate that power strip and just plug the computer and monitor into an outlet.
I would believe it's a problem with your motherboard. If you warranty covers it, tell Acer about the problem and have someone fix it. Otherwise, find a PC repair shop near you, and take it in to have it tested. Make sure you figure out what is wrong exactly before you buy new parts if you take it to a repair shop.
Computers should be cleaned and the CMOS battery replaced yearly... open the CPU case and you'll see a Cell button, the battery, it might be dead already... replace it with the same type and try turning it ON...