GCX/GCP Not communicating

[RoyceW]

I played this past Friday night, everything was working better than it has in a long time which was nice. I brought all the gear to another of my rehearsal spaces last night, set it up and promptly noticed that although my GCP appeared to be working fine, it was not communicating with the GCX. The active LED doesn't light up at all, but the GCP memory is fine and is switching presets like it should. The display is also fine, so I know it's getting enough power, so hoping this is a cable issue.

The GCX is providing phantom power to the GCP, so it may be the cable, but the GCP is receiving power and behaving normally.

Any help would be greatly appreciated, I'll be by the rig tomorrow night to test any answers you may have.

Thanks!

[JohnClark]

Check closely that you are not rotating the MIDI connector when inserting it into the Ground Control Pro MIDI Out. Because this is a 7 Pin connector, it is possible to force a 5 Pin cable into this connector with the pins misaligned. The locator dimple should be at the bottom of the shield when plugging into a Ground Control Pro.

Let us know what you find.

[RoyceW]

I am 100% positive it was inserted correctly. I had the GCP sitting on top of my rack and was looking directly at the connection port (and cable) as I was inserting it. Whenever the cable isn't inserted properly on my GCX, the display goes weird and nothing lights up. The whole time I was trying to troubleshoot this issue, the GCP was properly powered and the cable was inserted correctly. I also tried switching the cable around to see if that would make a difference to no avail.

[JohnClark]

Is there any other MIDI gear in this rig routed after the GCX? If so, does that still respond when this problem appears?

How long have you had this GCX?

[RoyceW]

The only other MIDI piece I have is a TC GMajor 1 that is linked with the GCX as a device. Never had a problem with it communicating with the GCX, but as a result of the communication issue between the controller and the switcher, the GMajor doesn't switch presets either (obviously because there's nothing switching it). I've had this GCX and GCP for 3 years now. I've actually had to replace the GCP once and have had to send the replacement back for a warranty repair once as well for a dead Bank switch.

[domct203]

Have you tried a different MIDI cable from the GCP to the GCX?

Dom

[RoyceW]

It was the cable, thanks! In the meantime I also wired the GMajor so it's directly in the loop of my amp without going through the GCX. Somehow cleared out my volume loss issue. Working!