I have a Latitude D830 running Vista. I have three D port replicators. It's worked fine for 4 months. On Monday, March 16, The latptop would not recognize the D port. I Have another laptop with the D port interface and it works with all replicators. That eliminates a replicator problem. When plugged into the d port, the D830 will get power, but none of the other interfaces function. The amber light comes on the d port when plugged into power, but it never goes to green when the pc is attached. I have run system diagnostics and it came up clean. Any suggestions?