Hi, I know this post is a little old. But I think this information really needs to get out there about Radions. I have looked through several forums and no one ever mentions this fix.
I had the same issue as many have had.
The lights won't go on. And they won't be recognized by Mobius. You try to reset them and the problem persists.
The solution is actually pretty simple.
Newer versions of Radions have capacitors in their power supply. You will see the blue LED remains on even when unplugged. What happens is when the Radion "glitches" from loss of power or any other technical issue. It becomes out of sync. Then the capacitor does what it is intended to do.
It holds the program.
Unfortunately the program is now corrupt so it is maintaining the problem.
The fix is easy, you need to unplug the device long enough for the capacitors energy to deplete. This is when the blue light goes out completely.
Then it actually resets.
A unfortunate result of technological advance is that the capacitor is quite efficient. I have had one Radion power pack hold power for almost 15 minutes. Now in our hobby 15 minutes may as well be 45 years, because when we trouble shoot we want immediate results. So few people will have the patience or time to wait for the amount of time needed for the device to reset. Especially when you are new to reef keeping and you haven't learned the extreme amount of patience this hobby requires. I've been keeping reefs for around 18 years now and I still need to work on patience lol. I have found the capacitor issue seems to be most prevalent in the Gen 5s. The Gen 6s reboot more efficiently In my brief experience with them so far, so they will do this far less often, if ever. And the Gen 3s wouldn't care if a nuclear explosion occurred. I have little experience with the Gen 4s, so I don't know if they have issues like the Gen 5s. But if they do or any Radions do for that matter.
Try this fix.
It has worked for me quite well and I wanted to share it with the community.
Radions are amazing lights and it would be a shame if people gave up on them.
Especially when the fix is really, really easy.