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Total functional failure and no diplay

Total functional failure and no diplay
Radio display reverted from time to one digit "7".

ANSWERS:

"+5 V voltage regulator shorted. Small transistor located Q4 across diode bridge.

Update (03/01/2020)

Hello everyone, for beginning, in this model is few revisions of main board, before fix it try to read schematic. My opinion. If you can tell me what part# you got on your main board, I can send you a copy of it."

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