Troubleshooting • Help! Is it safe to downgrade my RPi4B bootloader version?

Hey,

So basically, yesterday, I was flashing a new bootloader version to my RPi4B, and, well, it worked.

There's a problem though.

No matter what OS I try, absolutely nothing shows up on a HDMI display. (no signal after the rainbow splash screen)

The diagnostics screen can show up, but nothing related to the OS.

And I don't think bootloader logs will be helpful either, not to mention the fact that:

A. I don't know how to access UART or whatever shows you the bootloader logs

and

B. I don't think I even have the tools to.

Please help! :(

Thanks,
Chip

Statistics: Posted by chipthegoober — Sat Mar 22, 2025 5:34 pm — Replies 7 — Views 166

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