Question about Toshiba 57H81 57" Rear Projection Television
Zeutaluras, My guess would be the same as yours because the horizontal osc. is synchronized when you apply the signal to the HD inputs. I am assuming the signal with embedded horizontal sync and composite video passes through the tuner boards as you mentioned. I'll confirm with the schematic once I see it. If it is a separate board can you get one to substitute? I think you may be able to locate the problem with an oscilloscope and schematic if you can access different points in the schematic. I'll try to help once I know more. My problem prevents any type of built in diagnostics since the set doesn't power up.
Posted on Oct 04, 2006
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