G-2500 - Strange battery/power problem, need advice

Thread: G-2500 - Strange battery/power problem, need advice

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  1. #1
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    G-2500 - Strange battery/power problem, need advice

    I've got a G-2500 that I purchased long before I became a watch nut. As far as I can tell I purchased it sometime in 2007 and wore it daily. One day around 2009 the screen started acting funny, digits flashing on/off rapidly, and eventually the screen went blank. Eventually I got around to getting a new battery and installed it. I followed the proper procedures, made contact with the AC to the back of the battery and nothing happened, the screen remained blank. A few months later I tried again, same result. Now today I have tried for what may be the final time. Today, however, I at least got a little result. The screen lit up, although VERY dimly. And if I press the backlight button the screen goes blank and does not come back on. Now the battery I installed is new and should not be the issue. I even went as far as to test it with a volt meter and it measured 2.95 volts (its a 3v battery) so that doesn't look like the problem.

    Generally I wouldn't care about a cheap watch but this watch went through a lot with me. As a firefighter this watch has been in fires with me, gotten soaking wet, frozen on cold sub zero days. If it is busted it definitely put up a good fight, and doesn't owe me a dime. But if theres any way I can fix it and get in running correctly again that would be great. I wonder if water got in there and caused an issue? Its just odd the screen comes on somewhat but very dimly even with a new battery.

    Open to any suggestions and advice or if you know of a previous thread covering this same issue I would appreciate it (hard to search for this specific problem on the forum without tons of other unrelated threads coming up).

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  2. #2
    Member gaijin's Avatar
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    Re: G-2500 - Strange battery/power problem, need advice

    Sorry, but it still sounds like a battery issue - even though the one you put in test OK.

    I'd try another fresh battery.

    HTH
    "So?"
    -Andrew Breitbart 1969-2012

  3. #3
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    Re: G-2500 - Strange battery/power problem, need advice

    OK took your advice and got some fresh 1616's. As shown in the pictures a fresh 3v 1616 is actually around 3.156volts. Put the new battery in and the display is in fact brighter but its still messed up. As you can see some digits are missing/blinking. Also when I change modes it goes dim, almost blank, then eventually comes back after a minute. I went as far as to take the module pretty much totally apart and reassembled thinking maybe a contact was loose or coroded. Everything looked clean and in order.

    I guess my final diagnosis is some little transistor, ic chip, etc got fried and theres nothing I can do. On that note, does anyone know if I can buy just the module? (and if so where?)

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  5. #4
    G-Shock Mod stockae92's Avatar
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    Re: G-2500 - Strange battery/power problem, need advice

    can someone verify that the module uses 1616 battery? Most of the module uses 2016 instead.

    and also you have to do the AC reset after each battery change.

  6. #5
    Member gaijin's Avatar
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    Re: G-2500 - Strange battery/power problem, need advice

    OK. Nice work.

    My Plan B might sound a little strange, and I have no scientific explanation why it might work, but here it is:

    Take the battery out, put it back in and try the AC reset again - hold the connection for a good 30 seconds.

    If that doesn't work, try the whole procedure one more time.

    I have had older movements that were left unpowered for many months only come partially back to life at first (just like your experience above), but eventually return fully to life after a couple of cycles of battery replacement and AC resets.

    It is definitely encouraging that your watch at least looks better now than it did after the first time.

    HTH
    "So?"
    -Andrew Breitbart 1969-2012

  7. #6
    Member gaijin's Avatar
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    Re: G-2500 - Strange battery/power problem, need advice

    Quote Originally Posted by stockae92 View Post
    can someone verify that the module uses 1616 battery? Most of the module uses 2016 instead.

    and also you have to do the AC reset after each battery change.
    Casio.com states CR1616 as the appropriate battery: G2500-3V - G-Shock - Mens, Womens, Ladies, Digital, Analog, Watches | CASIO America, Inc.

    @Dwelch83: You are using CR1616 batteries, right?

    HTH
    "So?"
    -Andrew Breitbart 1969-2012

  8. #7
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    Re: G-2500 - Strange battery/power problem, need advice

    Removed post, don't want to contribute to a board run by fascists.
    Last edited by Bonky McBonk; November 24th, 2011 at 06:30.

  9. #8
    Member J.D.B.'s Avatar
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    Re: G-2500 - Strange battery/power problem, need advice

    Hmmm. Sounds like a contact problem. You could try cleaning up the contacts and the battery of any fingerprints of other material that may be impeding good contact. Also, there might be a contact breaking/broken in the module. The AC contacting should only take a second to accomplish resetting the module.

    Josh
    Thank you, I'm flattered, but, please don't click any "Likes" for me (unless there's a prize for "most likes")?

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