My lab currently has a Varian CP-3800 GC in line with a Saturn 2200 MS all running on Star WS software. The GC is equipped with a TCD. We have been switching between the TCD and the MS as detectors. The system was fully functioning up until today.

Yesterday we were working on the GC only, and had the MS switched off most of the day. Today we were going to work on the MS, but now the MS will not communicate with the computer/software. The machine was communicating fine two days ago, and don't think that any of our testing should have affected the communication. The GPIB cable is securely plugged into both the MS and the computer. We also uninstalled then reinstalled the National Instruments MAX driver, but that also didn't seem to work. I also tried changing ports for the PCI slot on my Dell Optiplex GC. It seems to be some type of driver issue, but I am uncertain.

Is there a certain procedure or driver that I can follow or download? Any advice greatly appreciated!