HP-48GX RAM Card Problem

[Allen]

I've had good luck troubleshooting this problem by evenly spreading a drop of DEOXIT (c) across the card connectors using an anti-static brush applicator. Then inserting and removing the card several times in both card slots. This ensures the otherwise-unreachable connectors inside the 48GX slot get a magic coating.

Don't put too much DEOXIT on there, or it could attract more dust in the GX card slot.

Less likely, but I've seen the ABS in the card-slot warp a little towards the back of the calculator, putting mechanical stress on SLOT1 cards. I have no fix for this other than ensuring SLOT2 is also full, which may or may not alleviate the condition.

a small DEOXIT sample: See Amazon: B0015A5AAY

See the photo by "wipes" here: https://caig.com/deoxit-gold-g-series/