To really make sure, you could try another slot, but I
predict that
you
will have to try another card.
PC connections and issues with those:
Assumed it's a PCI or similar slot card, just remount the card several
times ... "fidgeting" isn't good, please ask somebody able to see to do
it. Mounting cards even for "seeing" people is a PITA, but the
poltergeists like to disconnect RAMs, PCI and ESPECIALLY SATA
connections without clips ;).