X2 port on a TZ400
I'm experiencing a strange hardware error. Last, week I was using the X2 port on the TZ400 and it was transmitting data from our internal network out to the net and VPN's were working. This week, the X2 port isn't working when we plugged in any external internet sources and the VPN's are no longer working. When, we move the cable to the X1 port then all communication and VPN's are working. No, changes were made on the TZ400, is there any diagnostic tests or log setting I can use to troubleshoot this?