Computer tech help?

[indiana_j]

Argh.  Okay, so I went this morning to hop onto my computer - I had left the monitor on last night and after about 10 minutes, it goes to sleep.  I move my mouse and the screen doesn't pop back up.  I try again and the same.  I hit the off switch on the monitor and then turn it back on - I get a flash of color, a little box saying "VGA No Signal."  Frustrated, I restart the computer and...nothing.  I check all the cords, they're all plugged in like they should be.

...am I right to be afraid that something has happened to my video card?