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Travis Radloff
Travis Radloff Posted on Jan 21, 2015
Answered by a Fixya Expert

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Proscan inverter board won't power o, Any ideas?

I bypassed the mainboard to see if the backlights worked i unpluged it pluged it back in now tv turns on then off

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  • Sp Gupta Jan 22, 2015

    In your case either the inverter or the back lights seem to be having problem.

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1 Answer

Sp Gupta

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  • Proscan Master 727 Answers
  • Posted on Jan 22, 2015
Sp Gupta
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Hi travis,
you din't mention what happened after you disconnected the main board. unplug and plug is not bypassing.to bypass the main board you have to keep it disconnected.if the back lights come on and stay on after main board disconnected, the main board is defective.
good luck.

Testimonial: "the tv only powers on with the inverter unpluged"

  • 9 more comments 
  • Sp Gupta Jan 22, 2015

    Do you see back lights for fraction of a second with inverter connected..

  • Sp Gupta Jan 22, 2015

    In that case most probably it is the inverter. Good luck again.

  • Travis Radloff
    Travis Radloff Jan 22, 2015

    no I don't when I use my multimeter it read 0 on everything transistors resistors capacitors voltage fuses that all read 0 inverter board

  • Travis Radloff
    Travis Radloff Jan 22, 2015

    ok when i bypass the main board to the inverter board the backlights lit up after disconnecting to bypass and hooking it back up the original way to the main board the TV now turns on then off on then off when I disconnect the inverter board it turns on and stays on the inverter board that I bought is from Amazon although it does not have the same model number as the original one and it does not look like the original one although all the connectors are in the same place and it says its for my TV new inverter board work

  • Travis Radloff
    Travis Radloff Jan 22, 2015

    this is the inverter board that I got to replace RASG7.820.1717/ROH Manufacturer: Sharp Part: Backlight Inverter Board Part #: IM3860 PCB#: RDENC2556TPZZ Compatibility: PROSCAN 32LB30Q VIEWSONIC N3235W-2M VIEWSONIC VS11770-2M do you think it will work

  • Sp Gupta Jan 22, 2015

    Hi Travis, many a times the inverter boards are interchangible. Pl check the connectors and fit it. Hopefully it will work. Good luck.

  • Sp Gupta Jan 22, 2015

    One more thing, Pl check you get 24 or 12 volts DC, inverter on command and brightness control command on inverter connector.

  • Sp Gupta Jan 22, 2015

    24V /12V come from power supply and inverter on and brightness control come from main board.

  • Sp Gupta Feb 08, 2015

    Hi Travis, What happened to your tv. Were you able to repair it?

  • Travis Radloff
    Travis Radloff Feb 13, 2015

    I'm waiting for my inverter board I got sent the wrong one it should be here in a few days

  • Sp Gupta Feb 16, 2015

    I will be happy to know the result of your efforts.

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