Polo 25" polypropylene capacitors

Arm123

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Toronto, Ontario
I have 4 25" polo chassis here with various issues. I have a feeling this is gonna be a time consuming project... but fun and worth while.

One of the chassis keeps blowing HOTs from the base to emiter. I have recapped and replaced the flyback. Replaced IC102, IC103, IC104, T107

I have narrowed the problem down to the deflection side of the board by lifting L109 with a 60w lightbulb as a load.

I am trying to track down the culprit and have tested every component i can think of. I think something is failing under load. Im leaning towards the polypropylene capacitors.

They test fine out of circuit. Is there any other way i can test these to verify that the are 'good' ?
 
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