TV Repair Questions? Ask a TV Technician for Answers ASAP
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The fault is likely to be temperature sensitive that means when the set is at a lower temp (from switch on)then components within the set are failing and behave worse when cold, common ones are capacitors so the INITIAL check is for bad capacitors on the powerboard, other things could be a bad mainboard or hopefully not a bad LCD panel but the capacitors are likely at this stage, do you intend to carry out work yourself on the set?let me know I will provide more detailed info. If not then an engineer will charge around £30 for an assessment I am sorry its not specific let me know if you need more information or if you can do work.