I have Agilent GC 7890 equipped with SCD. Its communication with PC is suddenly lost, I have rechecked and reconfirmed its configuration but nothing seems to be working. On chemstation software it is showing connected/ not connected in 1-2 seconds continuously, although ping test form PC to GC IP is fine. I have also tried to change the PC but it didn't work as well. I have 3 GCs in my lab on same configuration, and 1 of them is now showing this behaviour.