Comment # 9 on bug 1197422 from Chester Lin

(In reply to Hannes Reinecke from comment #7)
> (In reply to Andreas Schwab from comment #5)
> > You should not use the preinstalled u-boot, but the one from the image.
> 
> Did so; copied the JeOS image (2022.03.18-Build26.5) to an SD card.
> U-Boot was not detected and the machine didn't even start to boot (ie no
> output on the serial console, LEDs not changing, etc.)
> 
> Bit of a loss on what to do next.

The JeOS image from Andreas' subproject works for me. Not sure if you might
experience the same HW glitch but the SD card slot of my board has a broken
spring so the card always gets ejected [I temporarily solve this issue by using
electrical tape]. Not sure whether it could be a common issue or not but I do
see a report here:

https://forums.sifive.com/t/sd-card-slot-broken/4754

Based on your descriptions [LED not changing] your board seems not able to
reach U-BOOT SPL.