Robert Lindblad

I had the same problem a few days ago.My computer wouldn't start and I'd have to shut the power off and then back on again before I got response from the computer which was basicaly turning on for like two seconds and would shut down. Then it would freeze on screen while doing the memory check so here's what I did....unbolted the top part of the fan connected to the motherboard then cleaned out all the dust caught in the grill by inserting a plastic buisness card in and out of every slot in the grill and blowing the rest out....unconnected and reconnected the hard drive, cd-rom, dvd burner and floppy.I've had no problems since.