PVM-1271 HV Shutdown or ?

[colorfixer]

My beloved PVM1271 tonight decided that after about 1 minute of operation, it was going to shut down. When it does this, it leaves the status LED's on, loses lock on what color system it was decoding, and kills raster as if it was going into HV shutdown. Cycling the power repeats the cycle. There is an interesting slight hum in the audio that doesn't vary with the volume control that alters in pitch with the vertical hold when it does run.

Before I tear into it like a bull in a china shop, I was wondering if anyone here has seen anything like this. I'm hoping it isn't a bad HSTAT divider.