Question Pc boot

[MikeGrx6877]

Hey there, my pc sometimes will boot but some other times wont (i mean fans led etc will be ok but screen remain black). There are times i check the rams, hdd cables, pci cards and cpu fan by push them a little and after that check pc will boot normally. Anyway, i've checked a lot of solutions like changing mb battery, unplug one ram or unplug them and put them back but nothing seems to fix the problem. Maybe its ram fault cause its ddr2 both of them, changed mobo +7 years (half system is old (before 2007 was made) and i changed cpu paste one month ago. (Sorry for the bad english btw)

 

[tshinhar]

Well with a system that old it could be anything really I would guess the motherboard or psu gone bad

 

[MikeGrx6877]

Thnx for the reply, i ll try another psu maybe, for the mobo i dont really know what i can do bacause if i vhange the mobo i must change rams cpu psu and there are bit expens