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
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