Question about Acer AL1912 19" LCD Monitor

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Acer 1912 monitor that ceased to function

One day when I turned the power on to my monitor it flickered and then went black.  The little indicator light on the front of the panel went black.  I made sure there was power at the plug and at the 3-prong input. Then I took the back off and the metal shield over the two circuit boards.  I inspected the power board for obvious burned components. Found none on the top surface.  I then plugged in the power and what I heard was a constant clicking sound like a relay trying to latch but failing. With a plastic tube in my ear as a stethescope I located the click as being somewhere in the large transformer, part # DG100017200 LSE  0442.  Has any one had this same experience? I do not believe the monitor made any sounds when it was working properly.  Any suggestions.


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  • aaronsara Oct 23, 2007


    Thanks for the comments. I agree it is a less than premium monitor. However, spending an hour or two of my time and a few parts is well worth it to get it operational.  I am quite good with an ohm meter and following circuits and with a soldering iron. However, I do not know how to test capacitors. Particularly ones stilled attached to the pcb.  Any suggestions.  Thank you.


  • Anonymous Jun 14, 2008

    exactly the same

  • oestby Sep 12, 2008

    The screen went black, no leds are shining. The yellow transformator at the power supply sercuit-board is making a just hearable clicking sound approximately every second.



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My monitor started to flash for 3 or four minutes before starting up, this was after three good years of faultless service. (I've always found Acer monotors to be excellent value) I was just about to purchase a pair of new monitors online when I decided to take it apart, as I had nothing to lose. I found that 2 capacitors on the mainboard had bulged and leaked. A quick trip to Maplins and 79 pence later I was armed with 2 new 1000uf 16v capacitors and within five minutes had removed and replaced the damaged items. I now have my good old AL1912 back in service.

Posted on Jul 08, 2008

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Yes, its what happens with crappy monitors ,sorry to say.  I had 2 CTX monitors in, both similar -- no power. After 2 hrs of pulling my hair out to find the problem came up with two capacitors that went out (on the power board). Got them unsoildered and replaced them with common ones.  One worked longer than the other, both people eventually tossed them and got a better quality product.WARNING: I don't know your background but remember, capacitors hold their charge even after the item has been disconnected from careful.

Posted on Oct 22, 2007

  • Sandy Chamberlain
    Sandy Chamberlain Oct 23, 2007

    In that case ...try this link
    best of luck!



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