XMON Issue

[RobSound]

Hi everyone,
I have a Icon Console With an Xmon and the last days when I listen a protools session the channel right lose level, I flip the output to the alt surround and mini output and i have the same issue. I tried to flip the input selection and works fine and when i come back to the main input works fine, but after 15 min aprox. the level down again.

Any suggestion? Thanks

[Jeezer]

Check the cables aren't damaged.

That or bad caps somewhere perhaps.