Question about RCA 36V430T 36" TV

2 Answers

Rca 36" 36v430t

Tv powered off on its own other night..won't power on (not even the led) hear a light buzzing noise from inside the case toward the rear i think

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  • Anonymous Nov 02, 2008

    I have kind of the same issue. Led comes on but flashes with no sound or picture.

  • Anonymous Nov 02, 2008

    I have a 36 inch RCA, led flashes but no sound or picture. Only 2 half years old.

  • nikeman2007 Nov 22, 2008

    I have the same type whining noise and the set will not power on, when unplugging it kinds of whines down.

  • Anonymous Jan 13, 2009

    I was watching tv and the screen went blank only a high pitch buzz sounds now when its plugged in

  • CHILLIZ Mar 20, 2009

    My son was playing a video game suddenly the TV shut off. When I turn it on the LED is off and I hear the buzzing sound but no picture. What can it be??

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2 Answers

No arcing or evidence of hot spots. from what Ive been reading last few days is that the flyback high voltage transformer is most likely the problem. because it powers the tube but major parts of the board too.

Posted on Oct 27, 2008

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  • Master
  • 4,234 Answers

Without seeing the actual set, I can only suggest some of the common things that can cause this. Based upon your description, I would first look for a poor solder connection where the AC cable connects to the board. Look in that area for any charred spots. Let me know if there are any. The bussing usually is arcing of the AC power.

Dan

Posted on Oct 27, 2008

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1 Answer

When the tv is turned on I hear a loud grinding like noise


Hi,


May I know if the unit won't power up, has a three blinking led light at the front panel? Also, please check if the grinding noise is near the lamp assembly.


Mjsazon

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Sansung model 56 Inch hpl5663w first had a buzzing sound the tv repair man said it might be a color wheel but the tv played well except for the low buzzing sound . then one night the picture went black and...


Hi Charles,

Sorry for the late reply, I'm offline upon purchasing my service.
You have said that you can hear a low buzzing sound before the unit gone to subsequent shutdown and the lamp blinks green(meaning that the unit try to turn on the lamp for consecutive attempts but not generally mean that the lamp itself is faulty.) and the temp led light come on.

As a matter of fact all the information you have mentioned linked to the symptoms you've encountered right now. A low buzzing sound might be caused by faulty FAN inside the unit that trigger the error code (blinking of the standby/temp led light) and turns off the unit automatically due to thermal protection circuit.
However, the technician might be true also that the buzzing sound came from the faulty color wheel. To confirm it, you have to verify where the buzzing sound came from. Color wheel is in front of the lamp assembly. Faulty color wheel can produce the same symptoms you've encountered right now but most of the time, it shows 3 blinking led light at the front panel (Timer, Lamp, standby/Temp).

I would advice you to open the back cover of your unit, fixed the lamp door safety switch with the tape to make it in closed position( if it is on open position the unit will not power up), and then turn on the unit and observe the fans if will spin or not, and check also where the buzzing sound came from before the unit gone to shutdown.
I've suspected that the fault came from the fan based on the led light flashes. Please let me know what you will discover after following the steps above to verify where the exact fault came from. Also, let me know the exact status of the led light at the front panel, (Timer, Lamp, standby/Temp ), which of them lit solid/blinking, it will help us to narrow the caused of the symptoms.

Jdvillanueva

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1 Answer

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Nope, you have a bad part inside.
It's fix or replace time.

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If the TV has no power at all, not even the led light on, and does not respond to remote or button, then the most common is a faulty power board inside the tv.


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My 36' RCA TV JUST QUIT WORKING. TURNED ON POWER


A shorted horizontal output transistor or shorted flyback. If the flyback is shorted replace also its HOT.

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2 Answers

Buzzing noise with no picture or sound.


The power supply is telling you that it has a short. I think you have a bad high voltage transformer in the horizontal deflection circuit. I've repaired several RCA's with this very same problem. The newer RCA's are vert prone to high voltage transformer failure ! Stargazer

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2 Answers

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Sounds like you have a shorted horizontal out put transistor and bad flyback transformer. This is a common problem in the newer RCA's. I've had serveral of them do this. The noise that you hear is the power supply telling you that it's overloaded. Stargazer

Feb 17, 2007 | RCA F32649 32" TV

1 Answer

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That high pitched noise you're hearing is the power supply telling you that it has too much of a load on it and lowered its operating frequency which in effect cuts its output way down! Normally you don't hear any thing since the power supply operates at a frequency that's beyond human hearing. In an RCA this indicates more than likely that your horizontal output transistor is shorted and this short was caused by the flyback transformer shorting. This is a common happening with RCA's You'd need to take to a tv shop and have it checked out. Stargazer

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