Dell Studio 1555 not reading SD Cards

I have a Dell Studio 1555 running Windows 7 32-bit that has stopping reading sd cards. When I insert an sd card in the internal slot, I can hear my computer recognizing it has been inserted, but then unrecognizing it as if it has been removed. I have tried uninstalling and reinstalling the initial driver, installing a different kind of driver (Ricoh), running Microsoft FixIt, Windows 7 updates and anything else I could find but nothing has worked.

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