Hi and thanks for replying on a Saturday!

Well, I have tried making a new setup file. I have even installed the software anew on another MacBook Pro and an iMac as well (so I have tried making a new setup on 3 different Macs). The calibration procedure stops because the monitors cannot make the audio sweep.
The two monitors are visible on the "front page" of the GLM software, but they don't make any sound (like for example when I drag them from the "drag'n drop" symbol to the grid). When I click the "diagnose" button, the yellow flash is replaced by green color for about 1 second before the monitor continues flashing yellow.
When I try and make a new update of the monitors, it says "updated failed!". The GLM Adapter can be updated again (firmware version 1.0.10.2183), but not the monitors (firmware version 8351A 3 0015 0151 0240). The monitors are flashing yellow all the time. It's as if the update procedure has crashed something in the monitors.
I cannot make any test signals (test controls) or anything. The monitors are simply dead.
When I tell the GLM software to store factory settings to monitors, i get the following message:
"WARNING! Please check Stored switches of SAM monitors and subwoofers! Acoustic settings of the current group have been stored to the SAM monitors and subwoofers".
I also got this message:
"Failed to store Factory setting to the current group!! All SAM monitors and subwoofers not found on the GLM network, please check the power and network connections".
One more observation: Even if some of the dip switches are "ON", the GLM dialog window says "OFF" on all switches. In other words, it's as if the 8351a monitor can't communicate with the GLM - wouldn't you agree?
FWIW, I tried to cable up an analog setup from a DAC, and nothing happens; the monitor flashes red both with analog cables and without ANY audio cables at all. In other words: The monitors flash red when power cables only are connected.
Is there a factory reset function in the 8351a monitors to reboot the whole thing?