Apparently computers get pissed if you unhook the monitor. I unhooked mine to hook it up to my laptop as a second monitor, and now it won't work on my original computer!
Here's what happens:
*hooks up monitor
*presses start
*text, etc, shows up
*windows logo shows up (I suspect this is the problem) "loading windows"
*Monitor goes blank
*Monitor informs me connection lost
*me kicks monitor
***?!?!?!
