Power supply dead after replace an encoder

Thread Starter


Joined Jul 9, 2019
Hello everyone,
I own a Korg Kingkorg which I changed a broken "Select sound encoder"and just after replace it and try to turn on the synthesizer seems won't work anymore.
Few days later I ordered a new board, and I changed for the old one, but seems nothing changed.
Could be the other Power supply got damaged? (I attach a picture of the original Power supply board)
At the beggining I thought could be a fuse, but this synthesizer the only has a Tube valve 12ax7c , and I replace it too without success.
In that case which component should test ?
Thank you very much.
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