I have an acer monitor @ work. At least once a day the monitor itself will go black, but the power light on the monitor stays on (blue). I turn off the monitor, wait, and turn it back on. I get the acer logo and then it goes back to black. It doesn't respond to the computer (which still has power) and the monitor won't work again until I manually reboot my computer. It does not respond to the mouse or keyboard.
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remove power to your monitor; then remove the monitor's back cover and, front cover; when you can see the circuit board check for a buldged can capacitor or, two; replace these by unslodering them and, resoldering the new ones in place digikey.com sells the capacitors (don't forget the position of the capicitors they go in only one way
This Problem is Acer(s) Monitors. Though it is a nuisance one fix That has work for many is the Unplugging after it goes back to Good (viewable) screen. I have hooked mine up to an inexpensive Power strip to make it easier for me and just turn off at time indicated above and Viola Simple is as Simple does :)
Check the power cord where it goes into the monitor and make sure it is tight. When it turns off, if the power light is still on check that you are not getting message "No Imput"; it may be the serial connection on the back of the monitor or the back of your pc. Usually if this is the case the power light will be yellow, not green or will blink. Acer and Planar brand monitors are known for issues ranging from this problem to going completely black even when power light is green. If its under warranty, return it if trouble shooting doesn't work.
Sorry to have to tell you this, but this is common in LCD monitors. The reason that it is going black when it boots is for one of two reasons. You either have a bad power supply that powers your LCD or your LCD's backlight is blown. These can be repaired or you can purchase a new one. But if it goes black 9 times out of 10 is because the backlight is bad. These can be repaired!