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What is your refresh rate set to? At the desktop, with no windows open, right click the mouse and a dialog window will open. Click on properties, then the settings tab at the top, then another window will open. Click on monitor then at the bottom of the new window click on advanced. Check the refresh rate and change it to a lower rate and see what happens. You might even raise it. I hope this helps.
Have you used the Fn button on your laptop and changed the video display Icon on the Blue Function keys. You need to change the display wait a few seconds for it to take affect. There are several modes try them all so you know how to use them.
It's turns blue to power safe mode (yellow) it's prevent futher damaged to your monitor. It's seems you got a busted backlight inverter. Need to replaced a new one...Since you only got it for a few months, send it back to Acer for a replacement of a new backlight inverter... Have a nice day!