Question about Toshiba 57H81 57" Rear Projection Television
65H81 along with several other models has a problem--I have the Toshiba Service bulletin that explains this.
Basically the set you have and others like it use what is called a HYPER board (circuit board) that processes all signal for the set from all inputs---the way the problem usually begins is lines/noise for the first few minutes and then it clears up---as time goes by the length of time to clear up becomes longer--at some point it will not clear up at all.
The Hyper board is Soldered in in most of these sets and not a do it yourself repair---yes--I had one other person who was on this site with the same set and problem and with directions and the photo of the board from the bulletin he was able to repair the board himself.
What is happening here is this board uses several surface mounted filter caps that begin to dry out and fail---caps that have lost value tend to try to function better after they get hot--hence the delay until the problem goes away.
This board is NO LONGER AVAILABLE FROM TOSHIBA--only two choices if you want it fixed--send it out to a company called PTS ELECTRONICS and they will repair it for you--last time I checked cost for them with shipping was over 200 dollars plus someone has to be able to get the board out safely and install it back after it is repaired.
Second choice is to find someone who can replace the 10 caps indicated in the bulletin (there is a photo showing which) which should cost under 25 dollars parts wise--Understand--most sets use filter caps that have two leads---the leads go through the circuit board and are soldered to the bottom of the board--these sets use tiny caps with little tabs soldered to the TOP of the board--you have to be very careful removing them not to damage the board.
If you want I will try to post the bulletin for you to look at--it is acrobat reader and may or may not post well.
If this information has helped you rate this solution as I do this here for free.
Posted on Dec 12, 2009
Testimonial: "It sounds like my problem but I need the toshiba picture to know which caps and their value to buy and replace them"
Yes, if you couls post info regarding the hyper board, that would be very helpful
Posted on Feb 06, 2010
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Posted on Jan 02, 2017
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