Question about RCA P52937 52" Rear Projection Television

1 Answer

RCA P52937 WAS MAKING LOAD HUMING NOISE FOR A WEEK NOW TV WILL NOT TURN ON AT ALL, POWER SUPPLY ??

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  • munisr Mar 19, 2011

    YOU THE MAN !! THANK YOU

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  • RCA Master
  • 6,993 Answers

Hello,

the problem is either from the power supply or projection lamp. Does you TV has a green standby light in front of it when you turn? If yes, then replacing the projection lamp should solve the problem. If no, then fault is from power supply which means power problem.

POWER: The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.

The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board.

I do not think it needs replacement, rather some defective capacitors are causing this issue.
Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.

The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)

You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.

What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).

You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors).
After replacing these capacitor(capacitors) most likely the normal operation will be restored.

Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.

If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.

I hope this helps.

Good luck.

Posted on Mar 19, 2011

Testimonial: "THANK YOU I WILL CHECK IT OUT IN THE MORNING. I LIKE THE PICTURE ON THIS TV AND DO NOT WANT A NEW SET."

  • munisr Mar 19, 2011

    NO GREEN LIGHT COME ON WHEN I HIT THE POWER BUTTON, WOULD THE CAPASITOR CAUSE THE HUMMING I WAS HEARING?

  • Walesarumi
    Walesarumi Mar 19, 2011

    yes, it can cause it....

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