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Crown CE4000 no power on

Greetings,

I have a Crown CE4000 that had a Viper chip that exploded. I have replaced the Viper 100A, still no power on. I checked D1 and D2 and they checked ok. I am almost ready to perform an isolated AC test but wanted to ask if anyone had more insight where to concentrate if the issue isn't in the 127027-6 board.

I did notice the 120VAC is being delivered to the main board, perhaps a broken trace to the flybackboard, hmm?

Any help would be appreciated.

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