Do you think that removing the ssd will help?

It’s a sanity check to help you rule out things like unintentionally booting from the wrong device. Can’t boot from hardware that’s not there! If the USB does work with it removed, then something you believe about how the device boots is false and you can then try to figure out what. A lot of BIOSes will “helpfully” try the next device in the sequence if it can’t successfully boot from the first one – which can be really confusing when debugging.

Some other thoughts for things to check: does the device confirm that it can actually see the USB drive in some way? Does a USB keyboard work in the port you’re using? If there’s more than one USB port, have you tried a different port? Do your USB drives work in another computer?

I rebooted to the installation media to try another install. It was black too.

I assume you’ve probably already checked, but in case not, is the boot order correct? What happens if you remove the SSD entirely and try to reboot to the USB without it?

Also, does the SSD boot in another computer?

If you can’t get anything to boot on the tablet, I’d RMA it.

I have a few of those, and while the ones I bought have worked out fine so far, I think it’s worth cautioning people that they are annoyingly loud doing basic operations.

I tried booting an old Surface off a USB stick with stock Ubuntu once – probably either 20.04 or 22.04. (I tried this in June 2022 but didn’t make a note of the versions in my journal, unfortunately.) I was able to get it to boot, but I couldn’t get touch/pen controls working so I decided against replacing the OS. I didn’t have enough enthusiasm to bother experimenting with it further – I assume it probably needed the custom kernel.