I have a Mits WS-55809 I purchased 9/11/01. I've already replaced the IC chips and resoldered bad joints. It's been problem free since then until today. I notice the picture goes black (with good sound, tuner, etc.) If I change to a different channel, I'll get the picture back. It seems to do this more when cold, and not after it's been on a while. I'm leaning towards replacing the HV Block or maybe the Flyback Transformer. Am I on the right track? I welcome any input! Never replaced a HV block, but know that it can give you quite a shock!