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Thread: 5IEM M1O1 motherboard manual or jumper settings needed

  1. #1

    Default 5IEM M1O1 motherboard manual or jumper settings needed

    Hi everybody,

    I'm try to get work and old computer for a friend that do not want to change from it.
    The message on screen always says : Cmos battery check failed.

    there is no CMOS battery on this motherboard, only a chip called "odin OEC12C887" that does the clock work.
    I already replaced this chip by a new one the date is now OK! but still have a message saying : Cmos battery check failed.

    Can anyone help out with a manual or jumper layout for the mother board : 5IEM M101 socket 7
    or any other information that helps

    there is another code on the side of one ISA slot : 5IEM2-Z1 may this helps ?

    Thanks and Kind regards,
    Techtatan

  2. #2
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    Obviously the OEC... chip is a rebadged Dallas DS12887, so there's a replacement readily available.

    How about a photo of the board, so some enterprising soul can identify the chipset and perhaps match it up against the TH99 layouts?

  3. #3

    Default

    Hi

    Thanks for quick reply !

    Hope the Photo helps !
    5IEMM101.jpg

    Kind regards, Techtatan

  4. #4
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    I believe that your board is a Chaintech model.

    I hope this helps. It's a shame that you don't have cache installed on the board!

  5. #5

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    Looks like a COAST module is installed. Some boards had the option for both.

  6. #6

    Default

    hi again

    cache is installed if that reassures you !
    I was aware about chaintech (info i googled out). but that did not bring me further.

    The question is should there be an external cmos battery connected to a specific jumper or not ? thats why i'm looking for the manual or jumper settings !

    any help will be appreciated !

    Kind regards, Techtatan

  7. #7
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    No, no external battery--you're using a module with an internal battery (and crystal). There is no way to disable the battery. Did you re-set the time? Some BIOS routines keep reading the "battery fail" flag until the time has been reset.

    However, how old is the replacement RTC module that you added? Was it purchased new or used?
    Last edited by Chuck(G); May 30th, 2012 at 05:21 PM.

  8. #8

    Default

    Hi again

    I tried Cmos reset --> no changes on the problem !

    The chip was sold as new an packaging realy looks new.

    question : should there be an output voltage on the "odin OEC12C887" chip ? if yes on what pin.
    I tried to figure it ou by datasheet but did not get the right info!

    Thanks for your quick reply !

    Kind regards, Techtatan

  9. #9

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    hi again

    Update :

    I made an an autopsy on the old ship :

    31052012530.jpg

    maybe the ship i ordered was new but 10 years ago (stocked) ?!

    i will try with the Dallas DS12887 one and then update here !
    This may take a little time !

    Thanks, Techtatan

  10. #10
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    Quote Originally Posted by techtatan View Post
    Hi again

    I tried Cmos reset --> no changes on the problem !

    The chip was sold as new an packaging realy looks new.

    question : should there be an output voltage on the "odin OEC12C887" chip ? if yes on what pin.
    I tried to figure it ou by datasheet but did not get the right info!

    Thanks for your quick reply !

    Kind regards, Techtatan
    Without the normal +5 applied to Vcc on the chip, the battery is isolated--that is, without actually putting the chip into a working, supplied circuit, there's no way to tell what the condition of the battery is.

    I hope you did not purchase the OEC12C887 from a Chinese seller--there is a terrible tendency to sell pulls as new in that market.

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