Red Power Comes on, but won't switch to green

I have an electronics shop, and have come across this many a time. The most common fix is to replace the tiny board that the switch is on, a five minute fix, just unplug the board from a similar console with a diff. problem, and plug into yours... FIXED!!!

Get an original ps2 u know the fat one they have longer batterie life u obviassly blew yurs out