Mesa 7i96s / Network no longer working

It does sound like something on the mill is causing major EMI of perhaps ESD

Ethernet is transformer isolated and the 7I96S has ESD protection on the
7I96S side of the transformer so should be fairly well protected from surges.

Large ESD (static) discharges can cause damage however. Protection from
static damage is improved if the 7I96S frame ground pin is connected to earth
ground.

Hi.

Did You have any luck fixing the card. I have the same exact problem.

If you unplug the Ethernet cable from the 7I96S, do any lights on the RJ45 connector illuminate?
If so, this indicates ESD damage to the 7I96S's Ethernet port. This can only be repaired by replacing
the Ethernet chip.

To avoid this kind of damage, it important to ground the chassis ground on the 7I96S to earth ground.
 

I'm having the exact same issue. Everything worked fine yesterday and i came out today and i have nothing. All the green led's light up and locks in the on position when i try to start linuxcnc. I am adamant about ESD and EMI. The Mesa 7i96s ground is connected to earth and all my wiring is double shielded with no ground loops. Is it possible to get this board serviced or is i a doorstop now? The red light just continues to blink with the jumper in the up, up position and none of the green leds with light in the fallback mode. Ping is unreachable in up, dn and and in up, up. I am at a lose. Nothing changed except the date.

All the green led's light up

Are you saying the 4 green user LEDs all light when you start LinuxCNC?

That suggest communications are working

What does

ip a

report?

And what are the RJ45 LED states when the Ethernet is connected
and when not connected?

 The
red light just continues to blink with the jumper in the up, up position and none of the green leds
with light in the fallback mode. Ping is unreachable in up, dn and and in up, up.

Note that UP,UP is fallback at 192.168.1.121 and UP,DOWN is BootP
(DOWN,UP would normally be 10.10.10.10)

My bad. I had a brain fart. It is working in the dn, up position. I guess i lied, the thing that changed was the jumper postion. It slipped my mind i was messing with it. I guess thats what i get for messing with things late at night. I forgot i messed with it. This site is amazing. Most problems with these boards are user initiated. My question still stands; is it possible to get these boards service if something does go wrong with them? Not that i need it now but knowing the user (me) I am sure i will mess thing up at some point and need it serviced. I am just going to quit messing with things.

Yes, Mesa can repair these cards

if they out of warranty, there is a nominal
change for chip replacement, usually $35.00

If these are not is the US, its probably cheaper
to repair locally due to shipping costs.