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sound but no picture. tv shuts down and starts back up 3 times.

Customer Question
then turns off and all...
sound but no picture. tv shuts down and starts back up 3 times. then turns off and all 3 lights flash. we thought it was the lamp so we put anew one in. no fix.


how long does this take!!!
Submitted: 8 years ago.Category: TV
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Answered in 1 day by:
6/28/2010
TV Technician: Rick williams, Technician replied 8 years ago
Rick williams
Rick williams, Technician
Category: TV
Satisfied Customers: 7,445
Experience: 20 YEARS OF TV REPAIR ALSO HD, DLP LCD AND PLASMA EXPERIENCE
Verified

Hello friend, 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, So please don't Accept my answer unless you are satisfied, Can you please give us some more information so I can better answer your question?

 

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

Do you have a meter and Tools?

Are to trying to repair your Self?

Just know what to say to the tech, so time isn't a problem in repairs?

 

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Customer reply replied 8 years ago

Yes to all your questions.

TV Technician: Rick williams, Technician replied 8 years ago

Great you just read below for DLP technology,,

 

(Please click on high lighted words)

This is a very simple approach.

(OK IF LAMP IS OVER A YEAR OLD IT IS A SUSPECT)

First I would like for you to open lamp door make sure the lamp switch is in the down position, Make sure the bulb is plugged and good, remember if bulb is over a year old it is a suspect, turn unit on listen closely to a wheel start to turn first this is the color wheel and the crackling of the ballast second. If you can here the crackling or see a spark from the ballast it is good and lamp is the suspect. Ok, first would like for you to remove the rear cover, then plug in the set, Now the lamp switch I would like for you to press it and listen for the power supply to click if it does we can say lamp switch is good, next while looking at the ballast, see if it sparks.

If not, power supply and ballast suspect. (Pull lamp out and close the door tightly then turn on unit and listen for the ballast). Also do this test Were the wire is that runs from the ballast to the power supply, make sure it reads around 300vdc if it doesn't you need a power supply if it does you need A BALLAST. You can make sure the capacitors close to the connector are flat on the top if not you may have bad capacitors. It will be easy to see if The power supply and ballast has bad capacitors they will not be as flat on the top as the good ones, this is the problem. Also intermitting shut downs, This can be caused by the lamp switch, make sure switch is in the down position and The thermostat which is on top of the lamp housing, both can be tested buy shorting them out and running TV if any are bad Exchange them and you will be ok, lastly intermitting shut downs, lines in the picture can be the digital board this is a good tip on digital board

Picture of a ballast ,, Capacitor pictures ,, Fan 1 and 2 ,, Lamp switch ,, thermostat, Sensor

Well Good luck friend, and if my efforts on trying to help you save on those large labor charges are appreciated, feedback and a bonus will be appreciated

 

Thanks.

 

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