In this situation what I would do would be to replace the cable that runs from the Atari to the TV. Also, if you are using a variable power supply, make sure that the power supply is set on the propper settings and the polarity is in the correct setting.
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In this situation what I would do would be to replace the cable that runs from the Atari to the TV. Also, if you are using a variable power supply, make sure that the power supply is set on the propper settings and the polarity is in the correct setting.