I have already looked for a breakdown like this, it was the brightness knob that was not turned correctly and I had a white screen.
I guess you've already eliminated that possibility.
you have to go and get C1 and C2 at the local electrics shop and solder them!
I guess you've already eliminated that possibility.
you have to go and get C1 and C2 at the local electrics shop and solder them!

