I picked up a heavy sixer for 5 bucks on Craigslist and it is in need of repair. I got a picture for a few seconds then it collapsed. I cleaned the channel selector switch and power and b&w color switch... no luck...power supply is good and slot is clean tried a known working video cable think it may be a cap or voltage regulator or...rf mod....possibly tia ic. I can solder...so where should i start and where can i get the parts? Thx!!