So i have a late 2009 mac pro that i got from a family member. Up until last year October it was still working and operational but now i cant get the thing to work. I dont want to sell it as it is a beast of a system and would like to use it again. For those of you wondering i have replaced the small 3v lithium ion battery and theres nothing wrong with the power supply or the logic board. I cant jump the power pads and the gpu doesnt seem to have any problems either. Can anybody please help me?