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I have a Toshiba cx35e70 tv. The problem began as a turn on, live screen, no channels, no sound. I found that when I would tap on the tuner on the main board the problem would disappear. Every thing worked fine. The problem would return after the set was turned off again for an undetermined amount of time. A tap on the tuner again was the fix until the power was turned off. Pulled out the mainboard and re-soldered tuner pins and checked for broken traces. After that all worked fine for awhile. Now, the set has a live screen with a quick flashing picture with no sound. The tap on the tuner, or anything else, is no longer the cure. Picture and sound works perfect with VCR playback but the same when using the VCR for the tuner.

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Is the VCR going through ch 3 or video inputs - if video inputs your TV tuner is likely bad if through ch 3 seeif te picture goes funny on ch 3 without using the VCR the tuner may be bad on higher band channels - smetimes you can remove the tuner and resolder the tuner itself. But if it always works with the VCR just use it that way and don't bother with the fix.

Posted on Sep 27, 2009

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