Hello all! My dad found his old Pi and gave it to me. I did manage to start it once with the original sd card and found it hasn't been touched since 2015. I couldn't update pi on the original SD card (it had a crack and my computer refused to recognize it), but i got a 32gb SD card and tried to load ubuntu on it.
It loaded ubuntu for a bit fine, but in trying to get rid of Gnome i ended up just rewriting the SD card with regular old Raspberry Pi OS. Now, the entire thing won't work.
It
was at least showing the rainbow screen and not moving past that. I tried booting with no sd card and the same thing happened, so i tried to reinstall the bootlauncher via these instructions:
https://www.fastoe.com/blog/rpi-4_400-eeprom-recovery-guide
Now, with the SD card inserted, nothing shows on the screen and no green light is flashing. Any help is appreciated!