Gateway AB7653 (Profinet IO - Devicenet) Issues with ethernet port

Hello, I am communicating a siemens S7-1200 PLC (Profinet IO) with a KUKA robot (Devicenet).
For two months there were no problems with the operation of the gateway, during which time it was in our workshop while the project was being assembled.
Now that we are working on the plant where the project will be implemented, the gateway has failed operation since the first moment it was turned on. The electrical connection conditions did not change.
The ethernet port of the gateway does not respond, when connected to a PC through a network cable, the network adapter of the PC reports “network cable disconnected”. The activity LEDs of the PC when connected to the gateway do not turn on, when connecting the project switch the LEDs do not turn on.

The Profinet interface has the “GW status” LEDs, CS and MS remain lit green at all times. The “Link” LED remains off at all times.

6 posts were merged into an existing topic: Ab7653 problem