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I have a RCA M50wh74s Have no picture but have sound. I have replace Lamp and ballast on set still no picture, someone said it may be power board please help?

Led lamp on power board lights up green for a second than clicks and turn amber and stays.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Samsung DLP won't turn on-rapid clicking sound, lamp light blinks

it was bad bulb

Posted on Mar 04, 2009

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welcomejee
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SOURCE: TV powers off after 10 seconds of powering on....

Thats great, Please rate solution.

Posted on May 19, 2009

techman007
  • 1112 Answers

SOURCE: WD-62525, continous amber lamp light. No picture. Lamp is good.

Hello:

Make sure u replace the lamp cover as the safety switch need to be closed to make the set work. If new lamp did not repair your problem , then it may well be the Ballast Board, Sometimes call the Lamp Driver.

Posted on Nov 28, 2009

ladywinn
  • 5138 Answers

SOURCE: rca lamp replacement, still no picture, power light still blinks.

Ballast Board #261629 Ballast is what turns Lamp on, Also Check your Lamp Fan if it is defective Lamp will not Light!

Posted on Dec 30, 2009

axeist
  • 1 Answer

SOURCE: 52HM84 Toshiba DLP with apparent failed lamp (replaced ballast)

I found R3 on the original board to be open, along with reading an open on CR1, D5 and D6. All the other transistors and the transformer check out. The only thing I have to do now is find out the specs of the diodes. The replacement board also had CR1, D5 and D6 open (R3 was OK). There had been some threads on various locations where remanufactured boards had bad components (the transistors were changed but not some of the other components).

Posted on Jan 18, 2010

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1 Answer

RCA M50WH74S REPLACED THE BULB AND THE BALLAST STILL NO PICTURE?


Did anyone look at the color wheel this set likely uses?

Mar 30, 2012 | Televison & Video

1 Answer

RCA DLP Model # M50WH74S Problem: Replaced blown lamp, when plugging it into AC, blue LED lights up right away for 2 or 3 seconds, then shuts off. Waited for a few seconds, and relay will click on and...


The blue led dies because the power source dies: it detects a big short on one of its outputs and shuts down to protect itself automatically. Since apparently it's a very big short and you just had to replace the bulb then the faulty part is the ballast board (the one that powers the bulb): when the bulb failed it has generated a power surge that fried it.
Replace the ballast and verify the power source board: if you're really unlucky when the ballast got fried it has in turn damaged the power board.

Oct 17, 2010 | Televison & Video

2 Answers

I believe it got some water dmg from water dripping from the ceiling. Can it be repaired? It makes a clicking sound when you turn it on, but it shows no picture.


That might be the ballast trying to ignite the lamp. You may have some serious problems. Have you tried replacing the lamp yet to make sure that ballast is good? If not, then you need to check the lamp then the ballast.

And also the power supply may be bad. You can open it up and take a look to see if the power supply has any blown capacitors too. A blown capacitor will look like an upside-down battery mounted to the board, but with a bulge out the top.

Feb 04, 2010 | RCA D52W19 52" Rear Projection Television

1 Answer

No Picture But Sound


I have a HNL5065W samsung that i just repair if it was the lamp you would not get sound,When Lamp goes out set will not come on only Flashing front lights, how long does yours play before cutting OFF? There is a couple of capacitors that will go bad on power board,CK to see if any of the capacitors are puffed up on top if so thats your problem.,But remember Ballast starts up LAMP CK the big capacitor on ballast board and small ones ,also Keep in mind it could be Ballast,if set keeps playing with sound and no picture another thing make sure nothing has come unpluged on DMD board, this board also will keep lamp from firing.OK heres another thing IF COLOR WHEEL is not spinning correctly lamp will not fire up, if it spins to slow or too fast most samsungs start out with Bad Color Wheel.I Buy on E-Bay got My lamp for 85.00 Ballast board 55.00 Ballast board at other companys 117.00 plus shipping! Color Wheel was 65.00.

Aug 19, 2009 | Samsung HLP4663W 46" Rear Projection HDTV

1 Answer

My 50 inch rca dlp tv will not turn on... the power light comes on but no sound nor picture. we had the bulb replaced about 6 mnths ago and and i know its not that. any suggestions?


Dont be to sure about LAMP,I have seen where NEW lamps can take nose dive, But try Ballast board that fires up Lamp,if it is Bad Lamp will not fire.

Aug 19, 2009 | RCA Televison & Video

2 Answers

Replace lamp on 50' rca dlp and still no working.


Before replacing the Ballast I would look at the power-supply and see if you notice any of the electrolytic capacitors tops being bubbled. It is not uncommon for the capacitors to go bad as the lamp draws more current as it ages and fails. If you do see capacity's bubbled, Replace them or have them replaced and the set will probably work fine afterwards.
Hope this helps,
Skyassoc

Jun 28, 2009 | RCA HD61LPW42 61" Rear Projection HDTV

3 Answers

Rca lamp replacement, still no picture, power light still blinks.


Ballast Board #261629 Ballast is what turns Lamp on, Also Check your Lamp Fan if it is defective Lamp will not Light!

Jun 04, 2009 | RCA HD61LPW42 61" Rear Projection HDTV

1 Answer

A repair question for the RCA M50WH74S


If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |


On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.

Aug 18, 2008 | RCA HD52W56 52" Rear Projection HDTV

1 Answer

No picture


Yes there is a ballast that fires the lamp. If the lamp doesnt light the set wont turn on. What model set do you have?

Jan 22, 2008 | Televison & Video

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