Question about Vizio GV42L 42 in. LCD Television

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No sound If switch to regular TV, then I have sound, but when switch back to cable there is no sound. Was working good Friday night, Saturday when turned tv on, had picture but no sound. Please help

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Yep this seems to be a common problem of the main board acting up due to faulty parts that get old prematurely. The source of this problem may be traced (?) to the power-supply regulation spiking caps in different sections of the main board or faulty discount-caps failing where ever they hapen to be used in the schematic.
The jury is still out...

Posted on Feb 16, 2009

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I'd have them describe 'fluctuating' and with what ?? If the normal cable signal is just intermittent from a break flapping in the breeze... I'd say No. If it were an over voltage from a normal input signal like the cable bouncing against a power transmission line... then you could attribute their connection to your damage. Best to take it to a good shop. The tech can tell you if there is over voltage or 'spike' damage to the front end, or signal input components. Tell him your suspicions and what occurred prior so he can document what he finds. Good luck getting anything more than a 'credit' from your cable co.

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