Hello, there are at least a couple of areas that could be causing this situation, but the most common is located in the deflection board, this board is located to the left of the service area as you remove the back cover. The most common failures are bugled or inflated electrolytic capacitors and loose solder joints. Another problem area is the power supply which is located to the rear of the chassis or main circuits assembly, look for inflated electrolytic capacitors.
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