Monitor only shows black screen

[BrainDeadBrandy]

Hello everyone. Sorry if this has already been solved I didn't see any threads that fixed my problem. I recently purchased an Acer ED242QR and when I turn my computer on I see exclusively a black screen. No logo and no windows. The menus don't show up either. I have tested my second monitor and it works fine. I try the Acer by itself and it simply doesn't display. I have disconnected all power supplies then plugged the monitor in and put the power supplies back in and nothing still. Any tips or should I just return it?

 

[rgd1101]

return it