Any ideas?

Can anyone point me in any direction?

I had the same issue. It started the calibration process, but it would just do the two or three first low frequencies before it aborted. I swapped the microphones, and the issue was duplicated to the other speaker. I did however have a failing chassis also (the midrange had no sound), so I ended up with a chase swap and a new microphone. Now the fugged up thing with this is that they are MK1. One speaker had already had a chase repair (swap), and the geniuses at the factory in Denmark had replaced it with a MK3-chassie. So now I am running one Mk1 speaker with software 1.6x, and a MK3 with software 3.6x So what messes up this now is that when they are off, the MK1 stays red, but the MK3 goes completely off after a few seconds. Only fix is to downgrade the MK3 to 2.6x

Hi, the serviceguy that install the repaired chassie should have adjust it so the stby leds behavior is the same!  

Hi, to pjop call your nearest dealer to have it repaired likely one of the amplifiers are faulty then calibration cannot be made and also the the other fault related to amplifier faults