i dont know what happened but all of a sudden my computer wont come on at all, the computer is a dell dimension 2400, when i push the button to turn the computer on nothing happens, when i unplug it and plug it back up the lights on the keyboard come on for a second then they start flashing an then goes out. no fans turn or anything, when i slid the side off to look inside all i see is one green light, i know nothing about computers, but i am trying to get some possible solutions, or should i just consider it a lost.please tell me this is minor