hi, this has happened to me before... when my brother changed the resolution too high, i just turned off the pc, take out the graphics card, connect the screen to the onboard graphics, and turn it on... then i went to uninstall the drivers for the graphics, restart. put the card back on the motherboard. go in normaly, and it should pick it up, asking to install the drivers, pop in the drivers disc... hopefully it works. or get a friend with a realy big screen, plug it in, set the resolution back to 800x600, and plug your old screen back in.
