I recently purchased an Express Card 34 to use with my Digiface and Lenovo T420 laptop.   After making the RME recommended BIOS tweaks to the PCI power settings, I used it successfully to record a show of 24 tracks for over one hour without incident.   I did this several times during the testing process.

Now for two days, I cannot get the computer to "see" the Express Card.  Device Manager does not list it in "sound devices".  RME DSP settings window will not open.  I cannot get any inputs/outputs to show up in Reaper Audio Preferences.  I have tried re-seating the card and have re-booted several times.

Please advise.  Since this has worked last week, I must be missing something.  Do I have a defective card if it is intermittent like this?

Media Man

Lenovo T420
Intel i5 Sandy Bridge
Windows 7 Pro 64 bit
RME HDSPe Express Card 34
RME Digiface