Here’s from a posting I made a few weeks ago describing what fixed this problem for me-
MikeJSTB:Today is the anniversary of the day you joined our community!:
Holy moley , it’s working!
And it was so simple, following the advice here https://youtu.be/CpXH9CWM_Kw?si=22RHynw93JpOXS0O
Basically use the Raspberrt Pi Imager.
- Use the “no filter” option
- Choose the RP5 boot loader from the options menu
- Burn your SD card
- Insert SD into uConsole & power up with batteries & USB C power supply
- Wait approximately 8 minutes
- Back to Imager, burn your chosen Rex OS Image
- Turn off uC remove usb c & batteries
- Insert your SD card from step 6
- Power uC up, wait a few…and it boots!!!
I’ve been fighting with this for months! Woo-Hoo!
I believe it was the “running the boot loader” step in steps 2&3 that made it work