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HP L1906 Monitor - Occasional Cracking Sound?


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5 replies to this topic

#1 F1Help

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Posted 11 January 2018 - 11:20 AM

Hi,

 

I use a HP L1906 monitor on my PC.  Occasionally, I've noticed a cracking sound coming from the monitor but it appears to work fine.  Just wondered what might cause this cracking sound and is it anything to be concerned about?

 

Thanks.



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#2 mightywiz

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Posted 11 January 2018 - 12:06 PM

anytime you hear crackling noise coming from any electronics you should take precautions to prevent stuff like fires (worst case) or anything else that may happen.

 

i would unplug it and replace it to be safe.



#3 DavisMcCarn

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Posted 12 January 2018 - 10:50 AM

That monitor is a CCFL LCD device which means there is one or more fluorescent bulb(s) inside the display panel and the power supply for it produces over 1,000 volts.  That is about the only thing that could produce a crackling noise.

Use a can of blow-off and, with it OFF and unplugged, blow in through every vent you can find to knock any dust loose and; hopefully, out.

If that doesn't fix it, start saving for a new monitor!


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#4 mightywiz

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Posted 12 January 2018 - 01:35 PM

crackling could also be arching from a transformer that's going bad.  or a bad solder connection could be arching also.  and yes dust in the high voltage circuitry i guess could happen.

 

but i wouldn't leave it plugged in unattended, but that's just me being a component level repair tech for many years and yes i'm old.



#5 mjd420nova

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Posted 12 January 2018 - 04:09 PM

Those high voltage stages of high voltage (over 300 volts) are prone to attracting any dust and dirt that enters the enclosure.  A removal of the case would ensure a more complete clean up, a paint brush and canned air would be needed to dislodge the dust collected around those HV components.  Done by a skilled technician of course.



#6 F1Help

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Posted 17 January 2018 - 01:00 PM

Thanks for your helpful replies.






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