Acer S240HLBID 24-inch Monitor 16:9 FHD LED 5 ms 100M:1 A DVI w/HDCP HDMI Acer EcoDisplay
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If the power cord is plugged into a surge protector, verify that the surge protector is powered on and working properly. Connect the monitor to a different computer to see if the problem is with the monitor, or the configuration between the monitor and computer.
If you are using an adapter to convert the signal to another connection type, try connecting the monitor to without the adapter. An example would be using an HDMI to DVI adapter. Attempt to use a different electrical outlet or test the outlet you are using by plugging in another device.Test to see if the picture looks right in your BIOS. If it does, this could indicate a problem with the video driver or possibly the video card.