Question about Proview HX303 30 in. HD-Ready LCD Television

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Proview MA-32EF1AC TV won't turn on. I have a TV that the power LED goes form red to blue when it is turned on and then right back to red again. When I expose the circuit board in the back the power supply board resonates and a low frequency and one of the labeled supply output is a little low. Is it possible that the PS board is bad?

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  • John Fortier Jan 04, 2008

    One of the funny things about this problem is that I disconnected the cable and connected my laptop to it to see if I could get some type of display which I was able to. So I then disconnected the laptop and reconnected the cable and the TV worked again for a couple of days and now is down again. Would you change your opinion with this information or do you still think that is the PS board?

  • Anonymous Mar 23, 2014

    TV will not power on, it worked just fine last night. Any suggestions?

  • Anonymous Mar 23, 2014

    TV will not power on, worked fine last night. Any suggestions?

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Power Unit might have some symtoms, But I believe cause might be on the main circuit. If power had totally failed It wouldnt give any output. Most of the swithching power units have overload protection. So if there is a component takes high current it stops providing the current. In order to check the power supply you can unplug the connection to main circuit and test with multimeter. For this case a qualified hands on technician's assistance unavoidable. As circuit should be diagnosed what is the cause of the issue. Especially Power Transistors (MOSFETS) should be checked.

Good Luck

Posted on Jan 04, 2008

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Although resonace does not always indicate power problems that would be the first choice.. i would say 80 percent chance that the power board is bad.. but theres always a chance that one of the other boards or even the panel could be loading the psu down

Posted on Jan 04, 2008

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