Hi John!
You have firmware 1.3.3 flashed now, correct? Do you remember which firmware version the device has been on before that?
And with both firmwares it has been the same symptoms, i.e. sometimes it boots, sometimes it doesn't?
What about the boot animation on the level LEDs next to the XLRs, does it run or do they stay dark?
And can you do me a favor and, if the device is stuck, connect it to a PC and check if it somehow shows up in the device manager?
With this information we can narrow down possible causes. But a device that only occasionally does not boot - that's a first as far as I remember.
Thanks
Marc

An update: it booted successfully again. Strangely it's saying it's on Firmware 1.3.0 even though I updated to 1.3.3 last time it booted successfully.

I there's anything I can try in the web interface while it's working, let me know!

Just tried it. It said invalid swu file. So I re-downloaded the file and it accepted it the second time. Completed update and then said power cycle the 12Mic. I did that and now it's not working again.

And it now rebooted successfully and says firmware 1.3.3. But after restarting again it fails to boot.

I had another successful reboot and it has retained the update.

Strangely, I've only had successful reboots in my hotel, not at the location where I'm recording. It boots about 30% of the time in my hotel, but not at all in the venue. Though I did test it the day before recording in the venue and it was OK then, so it has worked briefly in the venue.

Even if it fails to diagnose the problem, that's also informative...

Hi John,

I've had a couple of theories and tried them out with a development unit. Unfortunately I haven't been able to reproduce your issue. So Daniel might be right that this is a hardware problem. Where are you located?

Thanks
Marc

Thanks Marc – I'm in London. Thanks for looking into this! (I've also been in touch with Joost by email about possible repair.)

I'm thinking more about when it happened – it worked perfectly for over two years until I needed to change it to switched mode, which I did using Dante controller as described in the 12Mic-D manual. That's when the problems started. Are you able to use the 12Mic-D reliably in switched mode?

Thanks!

Hi Marc,

Thanks so much for continuing to pursue this. I had not used the secondary port at all until I wanted to change to switched mode. When I changed to switched mode in Dante Controller, it said I needed to reboot. I used the reboot button in Dante Controller but it didn’t seem to work – this was the first time it got stuck on the boot screen. I turned it off with the rear switch, and it took a few times before it booted again. Then it was OK for a week or so, with the secondary port functioning perfectly in switched mode (with a Focusrite AM2 in the secondary port). So I thought it was just a temporary glitch, maybe from the change of setting.

I’m afraid I don’t remember if I already had the AM2 in the secondary port when I changed to switched mode. But I definitely had never used the secondary port before this.

Then after a week it again started getting stuck on the boot screen again, almost every time. The only times it has worked again since then have been with a complete power cycle with the rear switch, not with the front encoder.  And only about 2% of the time.

Thanks again for your continuing investigation!

Thanks Vincent, yes I have tried booting many times with nothing connected.