Normally lamp and DMD chip cooling fans would continue to run for approximately 4 minutes after TV is powered off. Now, fans turn off when TV is powered off. What circuits control the extended fan operation?
SOURCE: Toshiba 52hm84 DMD board
The DMD panel is made up of individual " Digital Micromirror devices" (DMD) one mirror per pixel. They are HD2+ DMDs which are the 4th generation DMDs. I dont have a part number but what is your set doing for symptoms? DMDs are basically small mirrors mounted on hinges that react to the digital inpulses so the signal can aim the mirrors percisely. Toshiba should have a replacement panel available. Let me know if I can assist you further.
SOURCE: Humming noise in Toshiba television
my 46HM95 was humming also, I have the extended warranty and the company came out and diagnosed it as the light engine. the part was backordered and it was just fixed today, it was ordered back in February. Problem was solved.
SOURCE: Toshiba 52HM84 DLP TV with new bulb but the lights keep blinking
They exact way the lights blink are telling you what the failure is. If the tv is firing the lamp and the lamp is bad, you will hear a buzz sound for about 1 second. The tv tries 8 times before it gives up and spits out the lamp error. Check the user manual for led diagnostics. If you put in a new lamp but still have issues, you've likely got a bad ballast (most common on this model) or colorwheel (less common). Both are part of the optical block (light engine) and I don't believe they're available as individual components from toshiba.
SOURCE: noise problem from the lamp cooling fan on 52HM85 model.
Its not the fan, its the color wheel assembly. Unfortunately, its not available from Toshiba. Check with PTS in Indiana.
michtech
SOURCE: I nees a cooling fan for a Toshiba 50HM67 50 inch
trucker I found this website....http://www.discount-merchant.com/ProductDetails.asp?ProductCode=1089868%2DTOSHIBA&Show=ExtInfo hope it helps
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