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Re: no picture,but have sound.
Theres a problem in the sweep power supply. If your not a tech this could be a tricky repair. Its going to take speacial equipment and the know how to trouble shoot these circuits. This is not a repair for the experimenter or handy person. Please seek a pro to assist you with this repair. good Luck
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Hi this is Matt, some units have fans in the back, if you can open it and look in the back, also make sure its free of dust in the back, this can be from overheating, also bad solder joints on the power to the lights in the screen, can be this, you may need to replace the board, feel free to get back to me