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  • Re: Apple II (rev1) instability...HELP!

    From Philip Lord@philip.lord@yoobeecolleges.com to comp.sys.apple2 on Sunday, May 16, 2021 16:38:53
    From Newsgroup: comp.sys.apple2


    Follow up (many years later)...it's an issue with a cold solder joint or bad socket. Slight flex to the board produces anomalous responses. No fix yet, need to look into it further
    --- Synchronet 3.18b-Win32 NewsLink 1.113
  • From Oliver Schmidt@ol.sc@web.de to comp.sys.apple2 on Monday, May 17, 2021 09:29:27
    From Newsgroup: comp.sys.apple2

    Philip Lord <philip.lord@yoobeecolleges.com> wrote:

    Follow up (many years later)...it's an issue with a cold solder joint or
    bad socket. Slight flex to the board produces anomalous responses. No fix yet, need to look into it further

    Back them I witnesses someone using cooler spray to locate a bad connection pretty precisely.


    --- Synchronet 3.18b-Win32 NewsLink 1.113
  • From Michael J. Mahon@mjmahon@aol.com to comp.sys.apple2 on Monday, May 17, 2021 18:00:17
    From Newsgroup: comp.sys.apple2

    Oliver Schmidt <ol.sc@web.de> wrote:
    Philip Lord <philip.lord@yoobeecolleges.com> wrote:

    Follow up (many years later)...it's an issue with a cold solder joint or
    bad socket. Slight flex to the board produces anomalous responses. No fix
    yet, need to look into it further

    Back them I witnesses someone using cooler spray to locate a bad connection pretty precisely.

    Probing the board with a non-conducting probe can also be quite effective.

    --
    -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com
    --- Synchronet 3.18b-Win32 NewsLink 1.113