|Is it a laptop or desktop system?|
If a desktop then open up the case, disconnect the power & data cables from the harddrive and any optic drives, disconnect any USB devices. Now turn on power and see if you can boot into bios.
If you can then turn off, re-connect the devices one at a time rebooting between each change until you isolate the faulty component.
If it still blue-screens without any drives or peripheral devices connected then it sounds like the motherboard has been damaged when the plug was pulled.
Goin' Fishin' (Some day)