Question about Toshiba 57H81 57" Rear Projection Television

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Panasonic PT-51G44A TV

I have the above model and the picture keeps on getting darker and darker. What is the problem likely to be and how much would it cost to fix.? Would I be better off just buying a new TV? It is 8 years old and has been very good until now Any idea?

Thank-you
Jim
jarmstr597@aol.com
the picture keeps getting darker

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5 Suggested Answers

Slinteriors
  • 8617 Answers

SOURCE: Toshiba TP50H95 TV Won't turn on - Pete

You will need to trouble shoot the start up and shutdown circuits. Often this is a minor component failing causing the set to not power up or go into protective shutdown. Do you have the service manual for this TV?

Posted on Mar 02, 2008

  • 2 Answers

SOURCE: Panasonic PT-51G44A TV

Need new board, Letter D - Item Number afteer you take out the 10 or more screws.

TNPAO609

The part thats dont work any more would be C518 on the TNPAO609

Posted on Apr 11, 2008

  • 184 Answers

SOURCE: Toshiba 56hm66 New lamp worked last night, wont boot up again

You now have a defective lamp ballast board. It sometimes is the root cause of lamp failures in these sets. The problem here is that Toshiba does not sell the ballast board independently from the larger, more expensive light engine assy. Call Best Buy back and get a servicer out there. He may have to take the ballast board out of your TV and send it out for rebuilding.

michtech

Posted on Feb 14, 2009

SD Tech
  • 14553 Answers

SOURCE: Panasonic PT-47WXC43G Red Color problem

This is a convergence problem; in the customer menu there is an option to adjust it----if red or blue will not move in some direction---one of the two convergence IC's is bad and both need to be replaced.

I have step by step instructions telling what you will need for this repair. They are in Microsoft word----let me know if you want them and I will email them to you. You can buy both chips for this set on Ebay for about 13 dollars plus shipping for a pair.

etower.766@netzero.net


I do this here for free so if this has helped you take a moment and give me a vote here.

SD TECH

Posted on Sep 03, 2009

Testimonial: "Thanks I appreciate the info. Very quick response."

SD Tech
  • 14553 Answers

SOURCE: Picture image is unsettled when

LINES or noise from left to right etc. This is a classic problem in a lot of these sets--that this clears up after a while is also typical---the period will gradually get longer and longer for it to become normal.

This set uses a Hyper board for all signal from all inputs---about two dozen tiny surface mounted filter capacitors on that board---they dry out and lose value---flat caps will when hot attempt to regain some of the value they should have.


Board is no longer available from Toshiba, only way to fix is remove one in set and send out for repair to someone like PTS Electronics.

I have seen experts try to replace the tiny caps--usually several are off value or open---cheaper to send board out. Last one I saw cost was about 200 for rebuild, keep in mind same problem will happen again in 5-8 years.


Let me know if you have questions and if this told you something you did not know, rate this solution as very helpful as I do this here for free.

SD TECH

Posted on Aug 21, 2010

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1 Answer

It is a Panasonic PT 51G44A. It went out while I was watching tv. Tried to turn it back on, it made the sound like it was starting up then back to off. If I unplug it and plug it back in it does the same...


griesedieck,

You could literally have anything wrong with this unit but I have a tip at http://www.fixya.com/support/r6396176-projection_tv_troubleshooting which explains the troubleshooting procedure and should help you isolate the problem. It also will help you find any parts you may need.

Thanks for using FixYa and for the great rating.

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IT may be if the set has not been "serviced" in a while a cleaning issue. If picture got gradually darker try something easy first.

Unplug set and remove back cover.

Locate the three large black lens in set based on model number, use either a lens cloth or a paper towel with glass cleaner sprayed on it and clean all three lens.

The lens are the light source for your picture and if dusty the picture will be darker and duller looking than it should be.

If this is your problem it is a good idea to clean the lens at least one time a year.

Let me know if it works OR IF YOU HAVE QUESTIONS.

SD TECH

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There was a post on fixya in about December of 2007 detailing the replacement of capacitor C581 on the "D" board but w/o pics. I can't seem to locate that link now.

But... I just did the C581 fix on my set tonight. Here are pics

http://www.flickr.com/photos/cryoneer/sets/72157615779889301/

Hope this help.

====Disclaimer====
WARNING! There are high voltages inside the set even when unplugged dueto stored energy in some components. Do not attempt this yourselfunless you are experienced with this type of circuitry. I stronglysuggest that you get a professional repair person to do this work.
================

cryoneer

P.S.
33uF 160V capacitor from www.mouser.com is 82 cents plus shipping in quantity one.

P.P.S
Kids are disappointed we aren't going to upgrade to 52" LCD this week.

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Panasonic PT-51G44A TV


Need new board, Letter D - Item Number afteer you take out the 10 or more screws.

TNPAO609

The part thats dont work any more would be C518 on the TNPAO609

Mar 21, 2008 | Televison & Video

2 Answers

Panasonic Rear Projection TV -dark picture


Javabean,
First off I think you meant Panasonic PT-51G44A which is an AP815 chassis. That unit has an all to common failure of the capacitor at C581 on the D board which is a 33uf/160v cap. Replace it and I think that will solve the problem..
Bill

Dec 11, 2007 | Televison & Video

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