Very unlikely Darren, as a very low supply voltage would have an effect of causing a TVs picture to pull in from "all" sides to quite a severe level leaving the picture about half its normal size, to do that the mains voltage would have to drop about 20% (to 192v UK or 88v US) and if anything else was operating on the same circuit I am sure at these levels it would show up on whatever else was being used. The other point is of course (without wishing to seem a prophet of doom!) that the chassis in the model you have is known for these kind of faults to happen.

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