Is my 7I97T broken?

Hello.
I've a problem with the connection to my 7i97t. 
This card is two weeks old and I'm still test and configure the card with LCNC.
At the beginning all works fine. I connected the card with the adress 10.10.10.10.
But today suddenly the connection didn't work anymore.
Actually nothing is connected to TB1-TB5. Only the ethernet cable on the 5V is connected. And only the LEDs CR9, CR23 and CR27 are on (yellow).
I've tested so far
- the jumper positions of W11,W12 (DN,DN / DN,UP / UP,UP)
- changed the ethernet cable
- changed the pc
But all with the same result: no answer with the ping command.
The two LEDs of the ethernet port are on (left green and right yellow) and when I ping the green LED is flashing simultaneously with the ping command.
Is the card really broken or is there still a possibility to make the card running?
Marc

Note that if you change jumper positions you must power cycle the 7I97T for the changes to take effect.

Also if you change the 7I97T card address, you must also change the host IP address.

Do you get any lights on the RJ45 connector when the cable is unplugged?

Yes, after the changes I've power cycled the card and also changed die IP address on the host.
With noch ethernet cable connected, the right LED of the RJ45 port light steady yellow.

That unfortunately  means that the Ethernet chip has been damaged
by large enough ESD that a spark jumped from the RJ45 housing to the
LED pin. This is why it's very important to ground the frame ground
connection, especially when testing and plugging/unplugging cables.

This is repairable by replacing the Ethernet chip.