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I have a rca model # m50wh74s......i have sound and can control the volume and channel but there is no picture.....the blue power light flashes.....when it was working right the light was solid

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  • Anonymous Nov 17, 2008

    can control sound and channels but no picture

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Replace Deflection board cost 77.99

Posted on Sep 24, 2008

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CAN I USE A RCA UNIVERSAL REMOTE CONTROL FOR MY LCD COLOR TV MODEL NUMBER WF20L6


Yes the RCA universal should operate the normal functions like volume + & - , changing channels, power on & off. It may not operate certain other functions like picture in picture, on screen caller ID things like that. You should be able to get a stock replacement remote from the manufacturers web site.

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Need Source Dode for an RCA TV model DETK185R.


The RCA DETK185R TV can be controlled with Universal Remote Controls. I tested several.
The best match was a 4 digit universal remote from GE. Model Number 10841. Code 1961 worked almost everything.
With a 5 digit remote from RCA, model number RCRN04GR, Code 12372 worked Power, Channel, Volume and Input.
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An old 3 digit remote from RCA, model RCU-403A. Code 062 was able to control Power, Channel and Volume.
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Have a RCA M50wh74s replaced the bulb....blue light blinks 5 times again and again eventually a steady blinking all blue light bulb in correctly, door closed correctly, any suggestions and I have sound.


Bad Caps on the AC IN board? I would visually inspect the caps on the AC IN board for any sign of swelling or doming on top. They should be perfectly flat.

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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.

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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.

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2 Answers

Rca m50wh74s HELP


Sounds like a bad high voltage transformer (FBT). Call a service center.

Jan 11, 2008 | RCA HD52W56 52" Rear Projection HDTV

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