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I have very old computers; from time to time the RAM disconnects. I remove the DIMMs, clean the sockets using Isopropyl alcohol many times until it works again.

It will be fine for few weeks, but I can't use both DIMMs even when I tried 10 times; one will not work.

I expected mechanical failure of one tiny connector and repeated heat/cold of the main board, is there any solution except simply cleaning?

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    \$\begingroup\$ Polypropylene is a plastic. Do you mean isopropanol? \$\endgroup\$
    – Justme
    Nov 23, 2021 at 8:23
  • \$\begingroup\$ Yes Isopropyl, sorry mistake \$\endgroup\$
    – Hamed
    Nov 23, 2021 at 22:20
  • \$\begingroup\$ The traditional remedy for poor contact with card-edge connectors is to rub the contact area gently with a pink pencil eraser. \$\endgroup\$
    – Peter Bennett
    Nov 23, 2021 at 23:15
  • \$\begingroup\$ @PeterBennett hard to reach connectors inside the DIMM \$\endgroup\$
    – Hamed
    Nov 25, 2021 at 16:28

1 Answer 1

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Try to resolder cold/cracked solder joints on the socket pins.

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