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Black screen/no mods/dvd,leds,fuses regs all good. Advice please?
Black screen/no mods/dvd,leds,fuses regs all good. Advice please? –
I am trying to repair a scph30003r mainboard gh-022 when I got it the fan did not work I replaced ps5 and the fan is now good to go but the screen still remains blank. All dvd drive functions apear to be working the standby/power buttons and leds work. All the fuses are good. I have 3.5,5,8 & 12v live on the board. When the machine is turned on it has a brief examination of the dvd drive to see if there is a disc inserted if there is a disc it spins up the disc and appears to read data from it. But that is all. There is never any video signal out( I have checked with a occilascope). What checks does the system perform before activation the display. What is my system waiting for? Or is it running happily but the display chip is fried? How can I check?