w7ay Chen, Thanks for the review of best practices.
The new 13.8 V PS worked great. I tried two versions of the software in my AIR + 256.. Beta 2.2, 11.05 seemed to work properly, EXCEPT the "solve button:" is always lit; but doesn't work. DEAD. I then reverted back to the current release - 2.1.2, 11.01 and could find NO issues, NO "exposure failure" errors!!!!!!!! Did a 30 exp, 2 min autorun on M81 without incident......... I split the power supply source with a "Y" cable and ran one feed to the AM5 mount and the other to the camera.
I used the mount feed thru output to run the AIR.
So, I consider that the update DOES work if proper voltages are available. And, your USB3 cables are functioning.
Chuck
Sorry, for poor diagnostics if I made you chase your tail. Haaaaaaaaaaaaaaaaaaaaaa