hey guys..having and issue with my old pc...everythings powers up but no display...i dont want to disassemble my new pc to test psu so i ordered a new one...still waiting for it..tried papper clip test old psu and all was ok..then i connected psu tester and it showed all okk just -5 not working and im not sure what does that mean...maybe thats the case?any opinions welcopme thanks in advance