[TinCanAlley]

Originally Posted by old_tv_nut

You must not be measuring hFE correctly. A transistor cannot test good with a hFE of zero.

If the driver transistor were dead, you likely would not have horizontal scan at all. The driver transistor is very unlikely to be the cause of intermittent sync.

Again, if some function is intermittent, you should applied mechanical tapping, pressing and jiggling to find an intermittent connection.

I double and triple checked with two different meters and both read zero. I also found my old horizontal board and pulled the 755 off and tested. it had an hFE of 82.

I've tapped the crap out of everything, but nothing changed. I pulled all boards and reseated, nothing. I took the horizontal, vertical and chroma boards out and checked all the resistors and transistors. I then remembered the video processor board. It gets the sync signals. I check the resistors and all but two are within the noted value. The others were so far out, I'm going to lift a leg for better testing. One is 4.8K out of 10K and the other is 6.8K out of 18K. But most concerning is the IC. The legs are black from some kind of corrosion and/or heat. I tried cleaning them, but it won't come off. It is has migrated down many of the legs. There a couple with bluing from heat.