Computer won't turn on

pull the battery out of you motherboard it will reset your bios leave the battery out for a couple minutes then when you put it back in boot up and it should go into bios use your arrows to select set defaults hit enter then reboot it should boot up then if not its possible you have a hard drive issue.

I had a an outside breaker blow while my Gateway 506gr was on. Once power was restored all I could get was the colling fans powered on. Had a blank screen and no sounds of the comp trying to rebbot. I did just as James suggested, pulling the battery from the motherboard and re-inserting it after a couple of minutes. The comp was perfect upon restart, I didn't have to do anything further to it, thanks!

looks like my computer will start when i press the buttton but then it fails