I have been given a Technosonic LCD3201 TV that has no picture.
Symptoms are Powers up, screen is backlit, there is sound from the video source, but no picture. There are no onscreen controls either.
Having trawled google, it seems a common issue with this model, and it is recommended to replace the t/con board. Also, to check the Fuse on the input of the t/con board (and the power stabiliser). I have checked the fuse and that is OK. Is it possible to check the Power stabilisers without power, as re-assembling this and getting to the board for testing when powered up would be nigh-on impossible.
Having dismantled the TV and removed all the boards, I noticed that the video input board seems to power the t/con board. Further inspection of this video source board makes me a little suspect that it may be this board and not the t/con board afterall, as there appears to be some strange markings around some of the caps. See attached screen shots.
I have not come across caps like this before, but does this look like a leaked cap for this type of capacitor, or can these not leak and is this marking part of the assembly process?
Any other ideas for proving which board is at fault?
Seems this t/con board is common amongst many 32 inch TVs also.
Regards
Jason
Symptoms are Powers up, screen is backlit, there is sound from the video source, but no picture. There are no onscreen controls either.
Having trawled google, it seems a common issue with this model, and it is recommended to replace the t/con board. Also, to check the Fuse on the input of the t/con board (and the power stabiliser). I have checked the fuse and that is OK. Is it possible to check the Power stabilisers without power, as re-assembling this and getting to the board for testing when powered up would be nigh-on impossible.
Having dismantled the TV and removed all the boards, I noticed that the video input board seems to power the t/con board. Further inspection of this video source board makes me a little suspect that it may be this board and not the t/con board afterall, as there appears to be some strange markings around some of the caps. See attached screen shots.
I have not come across caps like this before, but does this look like a leaked cap for this type of capacitor, or can these not leak and is this marking part of the assembly process?
Any other ideas for proving which board is at fault?
Seems this t/con board is common amongst many 32 inch TVs also.
Regards
Jason
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