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Distorted audio from set top box

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    Distorted audio from set top box

    Box in question is a Grundig GUDSTB2000 Freeview (DVB-T) Receiver. Nothing special just wondering if it can be fixed.

    Picture is fine, channel change possibly slow, but the audio is distorted and slightly out of sync. Box has two scart outputs and a digital audio output. Audio is the same from both scarts. Haven't tried the digital audio output (not sure if I can).

    It's powered by an external 12v source which I know to be good. Inside there are around 40 electrolytics made by Secon and Chang. CPU is Zorran SupraTV ZR39162PQGC.

    There was one bulging Secon cap (1000uf 10v) next to the tuner but replacing it made no noticeable difference. I've replaced 3 others close by but still no change.

    Does this sort of problem sound like it would caused by bad caps? Don't want to go much further with it if it's more likely to be something else.
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