Have you updated the p4 firmware. I think only the last 2 GCC have the powerbar 6e on them. Also have you assigned the powerbars? Not sure why they wouldn't all turn on and act the same regardless? There's probably only a handful of guys that even have one, so will probably have to see what GHL says if you've contacted them?
Thanks. Running firmware 7.18 that came with the 4e, and a 6e PAB was in the box and is the one that’s working so assume they’re compatible. Will see what support says. Hopefully sorted soon as it’s taken 8 weeks from ordering to receiving it here in New Zealand (mainly customs delays).