AMB (Kress) 1050 FME-P DI not working...

I own a stepcraft d840 equiped with a AMB (Kress) 1050 FME-P DI.

Everything worked fine until the router refuse to start sudently. No info in the documentation.

Any idea how to find out if the problem is from the cnc motherboard ? parallel port card ? or the router itself ?...

Everything else works fine with the cnc, uccnc, no fume or odor and I have already pluged/unpluged everything and tested the wall plug.

The kress has just a few hours of use, on delicate works...