[Judas]

try to remove the battery and see if itll boot. you can also try to reseat the power cable on the motherboard. also, if you have switch on your power supply try flipping that fuker a few times on and off, and powering up a few times.

you can also remove all connection - video card and try to boot and see what happens. if you are able to boot, add 1 thing at a time booting until it stops and you could find your problem.