Samsung 740N Inverter problem (blowning mosfets)

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  • Honziq
    Senior Member
    • May 2014
    • 58
    • Kazaksa
    #1

    Samsung 740N Inverter problem (blowning mosfets)

    Hello,
    i have samsung monitor with IP-35135B PSU.
    Display does not light, i changed bad caps, pico fuse, two mosfets (I use IRF7389), then monitor starts to work.
    But after few hours of using it was going black again. Mosfets are blown again.
    Thanks for help
    Last edited by Honziq; 09-08-2014, 11:55 PM.
    Tags: None
    • Honziq
      Senior Member
      • May 2014
      • 58
      • Kazaksa
      #2
      Re: Samsung 740N Inverter problem (blowning mosfets)

      Now I find bad solder on one of the coils, which makes a short circuit. I placed new mosfet and monitor is running again. Now I waiting what happens after few hours

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