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    Welcome to these forums. Sorry if any of the...

    Welcome to these forums.

    Sorry if any of the following is 'suck eggs'.

    The motherboard stores certain configuration information (hard drive type, RAM amount, etc.). Among other terms, that is...
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    Welcome to these forums. I have added your...

    Welcome to these forums.


    I have added your C56/C58 'experience' to the list at [here].



    I see. The switch block SW1 photo that I had at [here] showed SW1's switch 1 in the on position....
  3. I have been away for a while. I have added the...

    I have been away for a while.

    I have added the manual and software to [here].

    Thanks.
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    With the banks of RAM, a lot of signals jump from...

    With the banks of RAM, a lot of signals jump from one RAM chip to the next, to the next, ...

    An open trace would explain the change in symptom - see [here].

    The circuit diagram will show which...
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    I would probably add it to the IBM 5170 section...

    I would probably add it to the IBM 5170 section of http://minuszerodegrees.net/bios/bios.htm
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    The Supersoft ROM screen shot at post #8 shows...

    The Supersoft ROM screen shot at post #8 shows failure of the MEMORY REFRESH test (specifically bits 6 and 3).
    At [here] is an example of the MEMORY REFRESH test failing because of a bad RAM chip in...
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    That card is detailed at [here...

    That card is detailed at [here]. The +3.3V LED is monitoring the -5V contact in the ISA slot. Therefore, expected to be lit, are all four voltage LED's.

    You must have +5V present, otherwise the...
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    I think that is time to pluck up the courage to...

    I think that is time to pluck up the courage to see if the 131 persists.


    ???

    At [here] is shown:
    - IBM Monochrome Display and Printer Adapter (MDA)
    - IBM Color/Graphics Monitor Adapter...
  9. Yep. That's right. And Aussie made diskettes...

    Yep. That's right.
    And Aussie made diskettes normally have extra labels on them like:

    "Not a drink coaster."
    "Do not frisbee into drive."
    "Keep out of reach of kangaroos."
    "Crikey. That hammer...
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    Adobe Acrobat 9 I open the PDF, then select...

    Adobe Acrobat 9

    I open the PDF, then select [Document] then [OCR Text recognition] then [Recognize text using OCR]. At that point, before actual OCR'ing, I can optionally change the OCR settings....
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    Additionally, I have hosted the provided...

    Additionally, I have hosted the provided Quadcolor manuals and software at [here].
    I also OCR'ed the manuals.
    Thank you.
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    Hello. Welcome to these forums. I suggest that...

    Hello. Welcome to these forums.

    I suggest that you run some diagnostic software against the card. CheckIt is an example (from the main menu, [TESTS] then [VIDEO]).
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    An upgraded motherboard ? Does your motherboard...

    An upgraded motherboard ?
    Does your motherboard have two or four rows of sockets for RAM chips.


    I have one of these cards.
    It too is the REV 7 version (printed on it is "ATRAMBANK REV 7")....
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    That is what IBM has done on my keyboard.

    That is what IBM has done on my keyboard.
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    It is the reset line. It goes to pin 3 in the DIN...

    It is the reset line. It goes to pin 3 in the DIN connector (the pin opposite CLOCK). I verified that by opening up one of my 83-key keyboards.

    Refer to [here]. The early version of the 83-key...
  16. R45 is probably acting as a 'pullup resistor'. I...

    R45 is probably acting as a 'pullup resistor'. I do not think that you have worked out the full diagram, because I expect that there is a second pullup resistor, one for the clock line. And other...
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    1. Do a thorough visual inspection. 2. Very...

    1. Do a thorough visual inspection.

    2. Very carefully, re-seat all socketed chips.

    3. Some motherboards like these will appear 'dead' if there is one (or more) faulty RAM chips in bank 0.

    4....
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    Welcome to these forums. Why do you write...

    Welcome to these forums.


    Why do you write that? Are you hearing a beep/beeps from the speaker ?


    That could be the processor in the keyboard doing that.


    I cannot see any other place on...
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    A link to Chuck's later version, version 0.94...

    A link to Chuck's later version, version 0.94 (XTATKEY_094.ZIP) is at [here].

    A slightly enhanced version of that is introduced at [here].
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    One possible cause for a motherboard reboot is...

    One possible cause for a motherboard reboot is the POWER GOOD signal from the power supply (see [here]) going low then returning to high.

    Some things might trigger that:
    1. Unstable mains power...
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    OS/2 Warp - No doubt intended for installation on...

    OS/2 Warp - No doubt intended for installation on the Enterprise's warp drive.
  22. The following measurements may prompt you to do...

    The following measurements may prompt you to do further research.

    12" x 8.5" = IBM PC (5150) and IBM Portable PC (5155) and IBM XT (5160) motherboard [As measured by me.]

    13.8" x 12" = IBM...
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    "Lurch has exceeded their stored private messages...

    "Lurch has exceeded their stored private messages quota and cannot accept further messages until they clear some space."
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    A bad video switch on motherboard? E.g. Settings...

    A bad video switch on motherboard? E.g. Settings made for CGA, but because of the bad switch, BIOS thinks you have MDA, and beeps because it cannot find an MDA card.

    Just in case, according to...
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    No alcohol involved nor needed. People tell me...

    No alcohol involved nor needed. People tell me that my humour is 'warped'. Luckily for me, it's not warped enough to have me committed to an asylum. Yes, I understand that some people will disagree....
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