Question about Samsung SyncMaster 150MP Monitor

2 Answers

Clicking sound I have a reoccurring clicking sound coming from the speakers. The sound happens even when the monitor is set to mute in TV mode. It happens in Video 1, Video 2 and TV modes. It goes away if I pick the PC option. Although I have not sent PC sounds to verify if it does indeed still occur. The clicking sound is random and not in any particular pattern. Any help would be great. Or if its even worth trying to get it fixed.

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  • Marinetrader Jan 22, 2008

    I have the same problem but do not have anything next to my monitor.

    The monitor has been working fine for the past 3 years and all of a sudden it starts popping sounds from the monitors speakers. I muted it and it still continues. Any suggestions will be greatly appreciated.

  • Ben
    Ben Oct 16, 2008

    I recently have the same problem.

    I'm an EE though - so I cracked open my monitor and replaced the audio amplifier IC ( TDA7268 ) to no avail. When the unit is powered off, no clicking and the power to the TDA7268 is shut off upstream.

    When powered on, the TDA7268 is powered up to 12V. After a couple moments, there's an oscillation that can be heard (whine) and then the chip heats up (too hot to touch) and the clicking occurs.

    The oscillation is > 200KHz so it eventually can't be heard, but it's there and trying to drive the speakers @ 8Vp-p.

    The Speakers are the only load to the power outputs and do not cure the overheating/clicking if removed from the circuit.


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I found the problem.


I've written up a small article on my website detailing the fix but in summary here:

Electrolytic Capacitors C826 and C835 go bad because of the heat stress applied by the audio amplifier right below them. Replacing those capacitors fixed my 150MP.


For more information see:
http://www.benjammin.net/www/pages/techtips/Samsung-150mp.html

Posted on Oct 17, 2008

  • Ben
    Ben Mar 03, 2009

    I have now fixed another one of these monitors with the same problem. So it's confirmed the clicking sound has been cause by the dead capacitors in 100% of the 2 cases I've seen.

    See my website for more information.

    -Ben


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  • 84 Answers

If you keep a cell phone by the speaker that could be the issue. Some cell phones, particularly Nextel phones, cause some interference. There may also be another device close by that is causing the interference as well.

Posted on Jul 06, 2007

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I just recently posted about this and you might have the same issue with the TDA7268 Audio Amp chip used in the 150MP that I am and currently trying to resolve.

-Ben

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