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ibm p70 8573-121

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  • 1ajs
    replied
    success after diging around the web to find the 1.04 ref disk again




    the machean has ms dos 6 with ms ram drive 3 and software for a ge series 90 plcs



    Leave a comment:


  • 1ajs
    replied
    found a replacement drive on ebay and now reads but i get an error when trying to load it saying its the wrong version. (1.12)







    i can get my original floppy for my 7561/7562 to boot


    witch loads to the menue it has but can't do anything

    Leave a comment:


  • 1ajs
    replied
    ordered some floppy head cleaners and got lucky on a ebay acution for a bunch of 2mb ram sent them msg to see if they had any 80-85 ns and they had some 85 ns got them yesterday turned out to be exact match to the one in my unit sweet 8megs of ram FTW and it cost me less then 5bucks

    Leave a comment:


  • 1ajs
    replied
    Originally posted by modem7 View Post
    1. Power off the PC.
    2. Wait at least a minute.
    3. Set the multimeter to its resistance setting.
    4. Measure the resistance of the fuse using the multimeter (one probe to one end of fuse, other probe to other end).

    If the fuse is good, it will measure less than 1 ohm.
    they apear to be good

    Leave a comment:


  • modem7
    replied
    Originally posted by 1ajs View Post
    anyhow hows one test those fuese?
    1. Power off the PC.
    2. Wait at least a minute.
    3. Set the multimeter to its resistance setting.
    4. Measure the resistance of the fuse using the multimeter (one probe to one end of fuse, other probe to other end).

    If the fuse is good, it will measure less than 1 ohm.

    Leave a comment:


  • 1ajs
    replied

    Leave a comment:


  • 1ajs
    replied
    aware i have the newer board figured that much out from looking at that site anyhow hows one test those fuese? let alone change them?

    mine has h1 style floppy

    Leave a comment:


  • IBMMuseum
    replied
    Originally posted by 1ajs View Post
    i don't see any fuses...
    You have the newer P70 planar (and display board) - there is a fuse above the PSU connection...

    Should have given you the link to the P70 from the start...

    Leave a comment:


  • 1ajs
    replied
    Originally posted by Spankmd View Post
    I have a P75, it had similar floppy issues. The problem turned out to be a fuze on the motherboard, right above the floppy connector. Replaced it, and shazam, I can now boot. (of course, this was after reloading the drive and the cable, with no luck.). You may be facing a similar situation ( not sure how similar the 386 and 486 motherboards are)
    i don't see any fuses



    also uploading a video of it booting up if that wiill help or not will see
    Last edited by 1ajs; April 10, 2011, 04:40 PM.

    Leave a comment:


  • Spankmd
    replied
    I have a P75, it had similar floppy issues. The problem turned out to be a fuze on the motherboard, right above the floppy connector. Replaced it, and shazam, I can now boot. (of course, this was after reloading the drive and the cable, with no luck.). You may be facing a similar situation ( not sure how similar the 386 and 486 motherboards are)

    Leave a comment:


  • 1ajs
    replied
    got a new battery for it at wallmart for 13bucks and still getting 161 163 and still can't seem to get it to do anything with the floppy disk just spins and the computer sits there but does nothing

    Leave a comment:


  • 1ajs
    replied
    nm the above msg......... got it working tinkering around

    anyhow looking at my batery from the modelk 50 has 1.6v guna see if i can boost some more life outa it befor i go spend 20bucks on a battery

    no battery boost fails looses power just as fast as u put it in

    floppy does it noise sound at power on if floppy in just spins but does not seem to atempt to read it just spins so i'm guesing the floppyies toast
    Last edited by 1ajs; April 8, 2011, 07:51 PM.

    Leave a comment:


  • 1ajs
    replied
    how do u use refstamp it just opens and closes realy fast

    Leave a comment:


  • modem7
    replied
    Some possibilties:

    1. At least one model of PS/2 can't boot from the diskette drive until it is fitted with a new battery. I can't remember which one (or ones) it is.
    2. Bad Reference diskette.
    3. Bad diskette drive (PS/2 3.5" diskette drives have a high failure rate).
    4. Faulty diskette controller circuitry on motherboard / loose cable / etc.

    Good P70 info at http://incolor.inetnebr.com/jshorney/p70.htm

    That site indicates that you should be able to boot from a DOS boot diskette after REFSTAMP has been used on it. That is worthwhile trying.

    Leave a comment:


  • 1ajs
    replied
    whats the proceedure to boot off floopy? and hows one test their floppy?

    Leave a comment:

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