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Rick williams
Rick williams, Technician
Category: TV
Satisfied Customers: 7429
Experience:  20 YEARS OF TV REPAIR ALSO HD, DLP LCD AND PLASMA EXPERIENCE
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Why did my polaroid LCD TV shut off by itself and no will not

Resolved Question:

Why did my polaroid LCD TV shut off by itself and no will not work?
Submitted: 3 years ago.
Category: TV
Expert:  Rick williams replied 3 years ago.

Will help this customer anytime,

Hello Sir/Ms, My name is XXXXX XXXXX Thank you for posting your question on Just Answer! I will be happy to help you with this problem, And possibly help you save on these Labor charges today, Can you please give us some more information so I can better answer your question?

 

 

are you willing to open the TV ??

And also have you any Television electronics experience? if not A family/friend with electronics skills that can help you out.

Do you have a voltmeter and screw driver?

Are to trying to repair your Self?

Or Just know the problem ?

 

Customer: replied 3 years ago.
I want to know the problem and am willing to open up the TV. Not tonight, I have no tools at work. I can get voltmeter for tomorrow. Could it be a fuse?
Expert:  Rick williams replied 3 years ago.

This is a very simple approach.

(Please click on high lighted words) If too technical cost for repair is around

Friend this is a very common problem with plasma LCD and also DLP within the power supply the capacitors also click here Start to fail and the way you can tell is to check them visually for swelling or expanding of the top. ALSO click here ,, and here also,,

It will be easy to see the bad caps will not be as flat on the top as the good ones, But also you can have a bad resistor or diode and even a bad regulator. Would like for you to take your meter and place it on DC voltage the positive end on every connector that says a voltage and the negative wire to the panel this is the best ground. Turn on and see if the unit tries to climb. If you don't find one that's trying to climb, another method is to locate a short circuit. Place meter on ohms or beep test follow same procedure no voltage should be shorted to ground. And this is the problem,

Exchange them and you will be ok, Well good luck friend. And if it doesn't work make sure the power supply is sending 24v to the inverters when you turn the set on your meter should climb but won't reach 24v because unit will shut down and if so we ruled out the inverters or back light I seen this problem also caused by the signal board it has a power on command missing and it looks like the power supply is bad but actually it's the signal board, it may be labeled on the board a active high or low 5v which sends the command to the power supply.

Good luck friend, and if my efforts are appreciated, feedback and or bonus will be appreciated

Capacitor pictures inverter pictures... cold spray can be used if your set works for awhile then shuts down. If you click here this is a complete process for troubleshooting a LCD

Rick williams, Technician
Category: TV
Satisfied Customers: 7429
Experience: 20 YEARS OF TV REPAIR ALSO HD, DLP LCD AND PLASMA EXPERIENCE
Rick williams and 5 other TV Specialists are ready to help you

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