Fix Samsung TV Turn On/Off With Screeching Sound Distorted Display

My sister got a 46″ Samsung 120Hz TV LN46A630M1F-S that started to turn on/off when plugged in, shows distorted pictures when on, off then on with bright screen with screeching sound reminding me of the TV in the original movie “Poltergeist”. If these are your Samsung symptoms then there is an easy fix for it. Don’t throw the TV away yet. This is not problem of the blown capacitors like my other Samsung.

On/Off with green screen and loud screeching sound.
On/Off with green screen and loud screeching sound.

***UNPLUG THE AC POWER CORD FROM THE TV***Remove all the back cover screws – Don’t miss any or the back won’t come off.

– Check the power board for bulging capacitors. The chance are they’re all good (the top surfaces are flat).

– Remove the controller board – BN97-0247B – send it to Ebay service provider or order parts to replace them yourself. Parts are: MP2363DN and 47uF 10V (NE 8 AS7) polymer tantalum capacitor.

– There are Ebay sellers that sell correct parts or provide the service for this replacement if you don’t have a soldering iron or skills to do it.

– This will fix this problem.


  • Works fine for me too, tried various capacitors first with no success, replacing the MPS MP2363D has fixed this problem for good.
    Must mention that it is not an easy fix, this IC as a thermal pad to the PCB and it requires good equipment and a little bit of
    experience to remove it. Also I did not have the proper equipment to put it back with the thermal pad properly soldered.
    Before to resolder only the 8 pins, on the PCB, I put a “flat solder” layer on the PCB thermal pad on the TOP to make sure that
    the IC is making contact with the PCB. On the IC TOP, I have added a small heatsink (Digikey AE10837-ND V2017B) + a sticky
    thermal pad between the two. So far so good, if I got some problem, I will have to solder it as it should.
    Thanks a lot, you saved me a lot of time and effort in debugging.

    Gaetan d’Anjou QC Canada

  • Confirmed that this fix worked for me and the replacement part numbers were correct and inexpensive ($7.50). My TV was a 52″ model – LN52A550P3FXZC

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