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  1. Just wondering if you ever got this to work? I...

    Just wondering if you ever got this to work? I have a similar system (PB410 Legend 125) with the same issues. Removed leaking battery, cleaned the area, and hooked up an external battery. See this...
  2. Thank you all for the information. Iím not able...

    Thank you all for the information. Iím not able to find a manual online for the PB410 motherboard to get the required voltage for the external battery. Iíll start with 2 x AA and will go from there....
  3. Packard Bell Legend 125 (PB410) Battery Replacement

    I recently picked up one of these machines and the first thing I did was cut out the corroding battery. Luckily, it doesnít look like the board is too badly damaged, so I think it will be...
  4. Yeah the failing bits were kind of all over the...

    Yeah the failing bits were kind of all over the place throughout the test. I had to record a video because I couldn’t write them down fast enough. I didn’t know about Ruud’s diagnostic ROM, I’ll...
  5. Help deciphering Supersoft results on 5150

    Hi all,

    I have a 64-256KB 5150 motherboard that is failing the critical memory test with the Supersoft diagnostic ROM. Iíve removed all chips from banks 1-3.

    According to...
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    I looked at it again under macro lens with...

    I looked at it again under macro lens with different light. Seems to be 1501476, which would match the 10/27/82 BIOS
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    Itís hard to tell. Here is a picture...

    Itís hard to tell. Here is a picture but the text is a bit worn off.
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    I have a 1 GB CF card in my IBM 5160 and it takes...

    I have a 1 GB CF card in my IBM 5160 and it takes about 30 seconds for the first directory listing. If 10 GB takes 10x as long, thatís a whole 5 minutes!
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    It was shear luck, probably a very rare...

    It was shear luck, probably a very rare occurrence.
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    On closer inspection I was mistaken, the year...

    On closer inspection I was mistaken, the year reads ď1981Ē and the rest of the hex matches the 1982 BIOS exactly except the last bit in the file is 77 vs. 78. It does not resemble either 1981 BIOS...
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    5150 U33 BIOS with Ď82 version anomaly?

    So I took a dump of the U33 chip on my non-working 5150 that I found on the side of the road. This chip is an NEC D2364AC016. The hex dump showed ď1501476 COPR. IBM 1982Ē in the first section, so I...
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    Thanks and sorry for the double post. It took a...

    Thanks and sorry for the double post. It took a while for it to get approved and I thought it may not have gone through.
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    Thanks Chuck(G), on closer inspection it does...

    Thanks Chuck(G), on closer inspection it does appear that the capacitor on C8 is damaged. Iíll replace that and the trace and see if it works.

    Just curious where you found the circuit diagram. I...
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    Just curious, which programmer are you using?

    Just curious, which programmer are you using?
  15. +1 for IPv6 :-)

    +1 for IPv6 :-)
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    Orange and white stamps on chips/boards

    Are these stamps on the board and chips just QA identifiers, or do they have some other meaning like for previous repairs for example? More specifically, this is for an IBM 5150.
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    Hi Chuck(G), Iíve found the logic diagrams in...

    Hi Chuck(G),

    Iíve found the logic diagrams in the IBM CGA cardís manual but canít seem to find the circuit diagram. If you could help point me in the right direction it would be most appreciated....
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    CGA card with burned trace

    Hi all, I recently came across an IBM 5150 on the side of the road in pretty decent condition. I took it apart to inspect the components before powering it up, and I found a burnt trace on the CGA...
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