Acer AL1716

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  • Per Hansson
    Super Moderator
    • Jul 2005
    • 5895
    • Sweden

    #1

    Acer AL1716

    Hi, got more stuff at my works electric scrap box today
    See the pic below, one single Elite 1000uF 16v cap in the upper left corner of the pic had ESR of 5.6 and capacitance of 150uF and was bulging

    I measured all the other caps and they where all fine, some where Elite and some where UCC
    The symptom of the monitor was that the green LED was flashing and the monitor tried to turn on the backligt, it just faintly flashed, almost unnoticable

    After swapping out that one single cap for a 2200uF 16v Samxon cap (closest I had) the monitor works flawlessly!!!
    Man, one single cap causing this whole thing to fail, just amazing, as you can also see on the PCB it has been very hot, and the solder on the backside looks like crap, but who am I to complain at such a nice price
    Attached Files
    "The one who says it cannot be done should never interrupt the one who is doing it."
  • Per Hansson
    Super Moderator
    • Jul 2005
    • 5895
    • Sweden

    #2
    Re: Acer AL1716

    Scored another one at work yesterday
    Replaced the same cap and it's up and running, ESR was 17 on this one and capacitance was 65uF
    PCB solder looked just as bad as previous monitor, either they become really overheated due to the badcaps and almost melt the solder, or Acer need to look over their RoHs soldering technique

    Ordered some Samxon GT 1000uF 25v caps because the two big ones close to the 1000uF 16v are also going bad, one is actually bulging...

    Easy way to know if the monitor needs new caps is to just feel the LCD after it has been on for an hour or so, it will get hot if the caps are bad (as is evident on the PCB discoloration!)
    Attached Files
    Last edited by Per Hansson; 11-03-2009, 02:33 PM.
    "The one who says it cannot be done should never interrupt the one who is doing it."

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