[sgroup] Wave Memory Dead

Hello All, I've had my S-770 about 3 months now and it's been working like a champ until today. I have 16 Mb of RAM that suddenly doesn't show up when the system boots. The only thing that has changed about my system recently was that I added an external SCSI HD, which the 770 had no problem formatting/copying/loading/saving, etc. I have removed all external devices (CD-ROM, Zip and HD) and tried re-booting. The system loads from the internal HD fine, but I cannot load anything into RAM because RAM memory is listed at 0.00 seconds. When I try to load a Sample/Patch, etc the 770 just freezes. Any thoughts? Rikk Nashville, TN