Question about Toshiba TP71G90 71" Rear Projection Television

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Wont turn on

I have a toshiba tp71g90 that was still working great until this morning I turned it on and came back 5 mins later and the screen was off and the front power led was blinking. I have tried unplugging it etc... and it will click like it is turning on when i plug it in, but then shuts down and the led blinks again. Is this a common problem? Any suggestions as to what it could be. It was working great.....

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Re: Wont turn on

I have the same problem with my 57h82. Did you ever get any good information back on repair of this problem. I havent heard from anybody. Thanks Rick

Posted on Feb 27, 2008

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Tv goes black and can still hear sound, then it will shut off, then turn back on. will repeat after 5 mins

Hey iterry,

I have the same TV with what seems to be the same problem (screen off, audio remains until turning off->on); posted in several places (including here) but yet to receive a conclusive advice.

Please check the following:

- Does the screen turn off exactly 5 min. later - or when high brightness frames come up (could be 1...2...15 min. into the run;you can check that by pausing on a dark frame for a while)?

- Try altering the set to 4:3, low definition (did mine through my UVerse menus) as well as manually reducing the brightness settings; see if this gives you longer screen activity (I often manage for several hours, until some stupid commercial has a few seconds of a bright-white screen).

If we are indeed both in the same boat, my findings thus far are:
This is not a lamp issue (changed, no difference); not a color wheel issue (changed a couple of months before this ****); probably not a temperature issue - though I'm still checking that.

I'm hoping it's the ballast; will soon check and LYK. Good luck.

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TV has gone into "protect mode" to do just that to protect against the damaging failure that has been detected, you will need a servicer to diagnose the failure. Good luck and Merry Christmas!

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Unfortunately there might no be a fix for this type of failure unless the LCD is open and perform a few measurements in the circuitry. Since the TV is less then a year old, I would suggest to contact the vendor or manufacturer to have it repair under warranty, most electronics devices carry one year warranty.
Let me know if you require further assistance.

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Bad picture until tv warms up

this is a very common occurance in these sets. toshiba has issued a servece bullteen with this set. Sorry to tell you this but this is a problem with some very small capacitors on what is known as the hypermodule. in my shop we fix 2 to 5 of these a month. you really have to know how to solder. Idealy replace the hypermodule is the best way. but......that board is hard to find. so we replace these 11 very very small componets with twezzers and a big magnifier. we charge about 250 to 350 for this repair.

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Its bad surtace mount caps in the hyper board.I dont know which ones .Any ideas out there ?

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You have a bad capacitor in your power supply.

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