Magnavox 19 inch blacks out loses picture won't turn off

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  • frafreg
    Member
    • Apr 2017
    • 11
    • US
    #1

    Magnavox 19 inch blacks out loses picture won't turn off

    I have a Magnavox 19 inch model 19MF338B that turns on fine and after about 10 minutes the picture will go black and I hear a high pitched tone. At that point, I can't turn the set off from the switch on the set or the remote. If I unplug the set and plug it back in, it works fine again for a little while. Sometimes it will fix itself and the picture and sound come back. I tried using the component input and the HDMI input with the same results. I also replaced the cable box which did not fix the problem.

    I'm not sure if the problem is the main board or the power supply which includes the inverter. I would appreciate any help you can give me to troubleshoot this problem. Thank you in advance.
    Frank
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