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Thats caused by the DLP chip. Unfortunately most Toshiba models will end up having to have both the DLP chip and the formatter board replaced at the same time to fix the issue where as other models only require replacing the DLP chip alone to fix the white dots issue
I don't know if one is even available for this model but you usually are better (since those chips average 200) to replace the light engine completely---if a problem in the engine it can damage the display chip again in exact same way.
Replace the DLP chip at cost between $160-$300 for the part and about two hours of your own time to do it. http://www.shopjimmy.com/samsung-mitsubishi-toshiba-4719-001997-dlp-chip.htm/
This is an easy fix, just change the DLP chip. I bought one on Friday and it got here yesterday, I followed the video instruction on Utube. I spent maybe 1 hr, because I kept going back and forth from the tv to my PC to watch the video. The chip is soooo easy to replace, and only cost about 150 bucks at shopJimmy.com
This problems very exspensive to fix.The Light projection Engine have a problems,with a IC design flaw.This problems happen to many Big screen tvs 65 and up have a design IC flaw by many companies like Sony,Mitsubishi,Toshiba and Samsang.Call up Mitsubishi make some kind of deal with them to help u to fix the Light projection Engine by replacing the IC or replace the whole entire Light projection Egine.
White dots on a DLP mean that some of the tiny mirrors on the DMD board have failed and are stuck in the on posisiton and always reflecting the white light from the lamp. The DMD on this model is not available sepratley so the complete light engine needs to be replaced. The part number for the light engine is 75006693.
TV shows large red spot in middle of tv when dark show are on, you can see it more. Now blue spots on upper right side too. Spend way to much on this tv to have these kinds of problems only after 3 yrs.
can see it in certain lighting
and even when the TV is off! It will appear lighter than the
surrounding areas at times and can be annoying. I called Toshiba and
had a service man come out and even though he acknowledged that this is
common, Toshiba will not replace the screen.
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