This means that your computer is putting out video that your monitor can't display. This is normally a resolution and/or frequency problem. You should turn off your computer any way you can, then turn it back on. As soon as you see the computer start up, start pressing the F8 key about 2 times per second. You should get a black and white menu. Select "VGA Mode" and press Enter. This will take you into Windows with the lowest display settings. You can adjust them from there by going into the Control Panel and selecting Display Properties.
I had this same problem. I just restarted the computer and it automatically detected everything and now it is fine.
I tried Sphynkter's solution and it worked! But once i went into Control Panel to change the setting, it just went back to ''Input not supported'' Why is that so? Is it because i've got no graphic card in my cpu? Please help :)
SOURCE: FLOATING BOX WITH ATTENTION INPUT NOT SUPPORTED
Your monitor has several different video inputs.
Go to the configuration settings on your monitor and select the video input that matches the video cable from your computer.
SOURCE: Monitor
When your computer is starting up, hit F8 and you'll see the safe mode, safe mode with networking, etc. screen...You should see a choice that says "enable vga mode". Select that and windows will start and the os will select a screen resolution for you. After that, everything will work fine...I hope.
Good Luck!
Anonymous
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