I could not get OMV installed on the eMMC with InterceptorOS. I had to install RPi Lite on the eMMC then install OMV through Rpi lite. InterceptorOS gave too many errors during install. Installing and running OMV from USB worked just fine too though.

@Axzez Support Wow. This thing is allergic to Windows. If a USB drive even touches Windows after the image has been written to it won't work. Not sure if it's Windows or the CM4 board causing issues, because I tried RPi Installer, Etcher, Rufus, nothing else worked from Windows. I ended up creating a USB Linux distro and created the interceptor gz image that way and it worked!!! My Linux skills are super rusty though. Couldn't figure out how to locate the .gz file that I added to the live linux USB to copy over to the bootable USB for the Interceptor/CM4. That interceptor desktop is super bare bones, but I guess what did I expect, lol. Is there any way to set resolution once in the desktop? The shared monitor I use is 4k, but want to run at 1080p otherwise text is very small, and also very laggy. I intend on installing OMV on it, that was my primary purpose, so I guess I have a lot more learning to do. Thanks for your help. Going forward I'll make a new thread if any other issues pop up.

@Axzez Support Thanks for your support. I did try several different brand and size USB drives with same result, even USB 2 and USB 3.

@Axzez Support I guess I need it ELI5 then. I followed that FAQ and it said to use RPi Installer, which I did. I selected "use custom" and selected the "interceptor-os-22.01.14.23.img.gz" file and wrote to USB. It still won't go to any "installer": https://i.imgur.com/oMjx171.jpg I also formatted the USB drive FAT32 and copy/pasted the .gz file to the USB drive and still it just cycles this here: https://i.imgur.com/ob5GbuI.jpg Either I'm missing something or something still isn't right. Edit: It notably says "Firmware not found", which is concerning. Is that firmware for Inteceptor board or the CM4?

@Axzez Support OK, I managed to get it up and running. I don't know why it didn't work before. But I changed nothing. Today, I just connected power and I got a boot screen. Although now it seems it won't boot from USB. PEBKAC probably. I downloaded image ( https://www.axzez.com/interceptor-os.img.gz ), extracted debian image from the file, used RPi imager (Windows) to write to USB stick, installed stick in Interceptor board, connected power, and this is what is shown ( https://i.imgur.com/y46eYRe.jpg ). Bootloader is Feb 16, 2021 which is later than the Dec 14 2020 date indicated in the FAQ. From what I've read elsewhere here, it seems that this USB should guide me through an installation? I have 32GB eMMC which is where I'd like to install this. I don't see any jumper anywhere to tell it to boot from USB or eMMC either. Is there something else I need to do? Thanks.

@Axzez Support Thanks for your continued responses. 12V fan stays on. I do not have another Pi IO board or CM4 board, unfortunately, and CM4's are impossible to come by anywhere unless you know of a source? I will put together a quick video/photos showing what I have done, showing PSU, voltage check, fan, USB, etc. Just will need a day or two.

Thanks for the response. I bought the RGEEK PSU specifically for this project, which is what I started with. It had the worse voltage regulation of the other two PSU's I tried (that I already had on hand). The RGEEK PSU fluctuated between 2 and 3.5V even after powered on. The other two power supplies, a Seasonic M12 II and KDMPower KDM-MFX9270H Flex ATX voltages didn't fluctuate at all and maintained a consistent 3.3V throughout. But they all exhibited the same symptom (no video output or indication of activity other than initial USB flashing). But just for my own knowledge, when powered on, should there at least be video output of some sort? Thanks.