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Constant buzzing sound

My 37 inch flat screen has a constant buzzing sound and a purple bar that goes up and down the screen

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  • 5575 Feb 15, 2009

    i have the same tv but the speakers wuit working all together.

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6 Suggested Answers

  • 189 Answers

SOURCE: buzzing emitted by vsx-409

Could be the result of having DTS compatible equipment connected through the analog inputs on the VSX-409D. Noise and distortion will result as essentially the DTS signal is being played back undecoded. If this is the case you'll have to connect your LD or CD player through the digital connections (coax or optical) and set 'Signal Select' (button on front) to 'Digital'.

Posted on Jan 07, 2008

hawkwatcher
  • 67 Answers

SOURCE: Buzz or hum

My guess would be +and -12v supply to preamp opamps has ripple. (drycaps or bad solder). I may be able to get you a pdf service manual if needed. kstahl65@att.net

Posted on Jan 31, 2008

jerryg50
  • 1635 Answers

SOURCE: Purple and green scrolling lines

This may be a mechanical or electronic problem that is dealing with the sync of the colour wheel. There is basicly no colour lock. This may be the replacement of the associated circuit board, or the motor assembly or the colour wheel.

The link below is describing about how DLP technology works. They are relating to a front projection type. With the rear screen type, the basic technology is very much the same for decoding the pictures from the TV signal.

http://www.hometheaterhifi.com/volume_9_1/plus-piano-projector-3-2002.html


Jerry G.

Posted on May 06, 2008

praky16
  • 744 Answers

SOURCE: Black vertical bar about 4 and a half inches wide down center of screen

hi...
It sounds like an Intergrated Circuit (IC) has fried.
Your best bet in this situation is to contact ur tv service operator and let them recommend an authorized service center in your area....

rate me!!

Posted on Jun 01, 2009

  • 1137 Answers

SOURCE: Constant buzzing in my 15 W amplifier

Make sure you have a ground prong on your power cord. Most input jacks nowadays are closed circuit. They have a switch built in that won't allow any sound without the cord plugged in. You may have a damaged jack that will give you a loud hiss, a loud hum or crackling depending on what volume your controls are set at.

Posted on Aug 28, 2009

  • 8 Answers

SOURCE: magnavox 37" flat screen model no.37mf23id/37

Yes, he means 2200 microfarret (called uf from here on out). Another important concern when buying a replacement is the voltage. You need to get something that is at least 25v. I recommend a 35v or better. Another notable point is that this may not always fix the problem. As with mine, there was also a 1200uf (microfarret) 35v capacitor that was blown. You can tell this because they bulge at the top. I have both of these caps (2200uf 35v and 1200uf 35v) on order and they will be here tomorrow. If I do not post back here then they fixed the issue for me. I suspect that this will resolve the problem. Look for bulges on top of the caps. This is an indication that they are blown. Most all of you experiancing these symptoms will see the 2200uf cap bulging but you may also see others bulging too. If you do then you need to replace those too. No electrolitic capacitor should be bulging at the top so if its bulging its bad, and if its bad then your tv will definitely not work. Have fun.

Posted on Oct 13, 2009

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