Halolight flyback?

[dieseljeep]

Originally Posted by bgadow

I do...sometime over the weekend I'll due some probing in that circuit.

With no drive, the horiz output would be the one red plating.
To get the damper red plating, you would almost have to have drive on the HO tube. It still doesn't hurt to scope the drive on the HO. There must be a problem in the boost circuit.
It's been ages since I had to trouble shoot this circuit.