Question about Toshiba 57H81 57" Rear Projection Television
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?
the picture keeps getting darker
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
SOURCE: Panasonic PT-51G44A TV
Need new board, Letter D - Item Number afteer you take out the 10 or more screws.
The part thats dont work any more would be C518 on the TNPAO609
Posted on Apr 11, 2008
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.
Posted on Feb 14, 2009
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.
I do this here for free so if this has helped you take a moment and give me a vote here.
Posted on Sep 03, 2009
Testimonial: "Thanks I appreciate the info. Very quick response."
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.
Posted on Aug 21, 2010
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