Question about Polaroid FLM-3734B 37 in. LCD HDTV

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Toshiba model no. 20AS25 when I turn on my tv, no image shows & it makes a humming sound

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Power supply board it the cause.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Posted on Sep 09, 2010

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Posted on Jan 02, 2017

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Toshiba 20AS25 picture does not fill entire screen


change the aspect of the screen to 'zoom 1'

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If the picture looks normal except it's just missing the edges or looks squashed or looks like it is zoomed in from the normal image then aspect ratio is probably the cause.

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Our TV is making a loud humming noise. We think


It's likely your color wheel rather then your fan. I've replaced quite a few of these and the fans are usually good. Get and estimate - I generally charge $250-350 Total
also google your model # and color wheel to investigate further.

Oct 24, 2009 | Toshiba 52HM95 52" HDTV Projection...

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I have a panosonic surround sound system and a toshiba 60" tv and when watching tv speakers have a humming sound , but when watching a dvd speakers are fine and no humming sound.what is the problem? Tv...


it depends on what volume level the tv is on
if the level of volume is low and making the sound then try unpluging or pluging in the sound system to the tv

Sep 13, 2009 | Televison & Video

2 Answers

Toshiba 62HM195, Loud hum noise when TV is first turned on.


I have the exact TV and had the exact same problems. It is the light engine with color wheel that needs to be replaced, and they are VERY hard to come by for this model. Our repairman has had our TV for 5 months and still cannot locate a vendor that carries the part. He said according to Toshiba, the part has been discontinued. If you happen to find one, please post. I'll do the same.

Aug 18, 2009 | Toshiba 62HM195 62" HDTV

1 Answer

My picture won't show after replacing the lamp


Actually that humming sound was not the lamp, the humming sounds come from color wheels when they're going out, and since the color wheel is part of the light engine system and it's not working, that's why you don't have an image, you'll probably ask your self why, since it's not the lamp.. the thing is that the light engine system is componed by lamp, ballast, color wheel and dmd board, so when one of these doesn't work, there will be no image reflected, because they work together

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1 Answer

Humming sound from new TV


Thank you for the info. I would suggest to take it back from where you bought it from if the store will allow a 90 days return and replace it for a new one, or you can contact Toshiba to get it fixed under warranty. There should not be any humming noise on the speakers.

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Toshiba 20as25


if you measuring the secondary voltage will it 's a 115 volts

Oct 15, 2008 | Toshiba 19A25 19" TV

1 Answer

Humming/buzzing sound


That could be either the ballast, or colorwheel. Does the sound get louder at the rear of the tv or louder in front. let me know I may be able to help you.

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