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Got a techwood tv model 40940fhddigital was working fine lastnight got up this morning turned on tv no picture but a strange humming noise any ideas please

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Axle80
  • 73 Answers

SOURCE: Loud Humming Noise

Samsung is notorious for having the motor on the color wheel burn out. If the color on the tv starts to fade or shift tones when the rev'ing or noise is happening then you'll know its the color wheel. There are only two moving parts in this set, the color wheel and the fans. If you're smelling something, it could be either. Take the back off the set and put a piece of tape on the lamp door switch and turn the set on. Try to pinpoint the source of the noise. If its a fan, no big deal, Radio shack should have a replacement. If it sounds like its comming from under the set, dig a little deeper and try unhooking the color wheel motor, not as easy as I am making it sound but either way the fan is about $20 to fix and the color wheel is about $100. Sure beats a $400 tech bill. If you get stuck, comment back and I'll send pictures of the dismantle.

Posted on Mar 10, 2009

video-tek
  • 150 Answers

SOURCE: My Samsung 50" DLP HDTV keeps humming when the DLP lamp comes on.

Hi, you have one of two problems, either the color wheel is going or one of the cooling fans are going, the color wheels are a very common problem in samsung dlp`s, sorry I can`t nail it to a specific part but I`d bet it`s the color wheel as they are notorious for failing in samsungs, video-tek

Posted on Mar 26, 2009

  • 147 Answers

SOURCE: Loud vibrating or humming noise when TV is turned on but picture is fine. Sounds like cooling fan bushing or bearing is out or fan is out of balance.

It is the color wheel. Impossible to do this yourself.

Posted on Apr 23, 2009

Mr_Wizardtex
  • 205 Answers

SOURCE: no picture, humming

lost the lamp, replace lamp

Posted on Jul 07, 2009

  • 195 Answers

SOURCE: no picture.

Most likely you need a new projection lamp. The "strange sound" you hear is most likely the lamp trying to fire.After awhile, the set"gives up' and shuts down. There is a small door in the rear, and the lamp is behind this. It pulls out, after removing a couple of slotted screws. The bulb inside of the housing is what goes bad--the housing does NOT need to be replaced, unless you get an "original"(read:: more expensive) mits lamp.


But a "generic' is available to replace the bulb in the housing ,Probably a P22-150, or 180 lamp, about a $300 repair, if you have someone come out--or, if you are mechanically inclined, you could replace the bulb from the old housing(EASY to do), yourself, and save about half of that, or perhaps more.

Posted on Oct 10, 2009

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