ive been making a build with very old parts ,basically got 2 dead pcs to combine them into a functional one.i put the system together but it wont display anything on the screen,its just completely black,all fans (including the psu and gpu) are spinning however but it just wont beep or display anything.what would be the faulty part most likely? i thought that it was the psu underpowering the system since it seems to be working ,i changed the original 520 one with a 400 and even tho it doesnt beep like on other systems it still has the same issue. whats probably the root of the problem?
q6600
p5qlse
gigabyte gt630
8g dr3 ram