Question about Toshiba TW40F80 40" Rear Projection Television

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No pictures and no sound on Toshiba TW40F80 television

Hello! When i turn the power on, the red power light on the front turn on, but no pictures and no sound appear! The problem appear when i'm looking the television, and whitout advice, i lost the picture and the sound in the same time, and the red power light still on. I need help for resolve this malfonction. I didn't see anything whit a visual inspection of the components inside. Thank's a lot for the resolution of the problem. Michel!

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Re: No pictures and no sound on Toshiba TW40F80...

Check soldered-in micro fuses in power supply. Ex.--F851,F852.
If there is a blown fuse, identify which B+ circuit it protects.
Most common - convergence IC's bad===replace.
Need more help? Let me know.....T.

Posted on Oct 23, 2007

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ok, if you do have a sound problem it is separate from the convergence trouble; this set uses two STK-392-110 ic's. you need to change both and any of the resistors near them that may be gone or open---then adjust the set with the original remote--you can do the adjustments in the customer menu or if needed in the TECH menu-I can tell you how to get into that menu--if you have no sound from the speakers in the set that is a separate issue.

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Most of these sets with a convergence problem just need the two chips replaced and the set adjusted---you can buy both chips on Ebay for less than 14 dollars plus shipping.

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William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631

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1 Answer

Toshiba tw40f80, replaced both convergence ic's, power light still blinks

Solder yoke plug and vertical IC connections.....try again.
Let me know.....T.

BTW....Tosh recommends STK-392-110's replace with -110T's
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Check micro fuses in power supply,Ex. F851,F852,etc.
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