Described by Pina. Never seen it help. Has always fixed this problem. Expensive part and hard to find. I have 4 left from my old service shop days.
Monitor goes black or remains black at power up.
No parts cost. Not documented by Pina. Touch up the solder joints, and you're back in business. The color screen can retain a 45,000 volt charge if the bleeder resistor is broken, and can kill you if you have a weak heart. I do mean to scare you.