I pulled my 9.2 install of LibreElec out of my RV and brought it in to upgrade to a newer build. It boots off of a USB thumb drive with the old build on it. I took another thumbdrive and installed the 10.0 install onto it with the USB-SD creator. I swapped that new thumbdrive for the original and booted my RPi4. I got the initial text screen for a second or two, but then it went black. The lights continued to flash for a while, but I never did get any video over the HDMI port that worked just fine in my previous thumbdrive.
Not sure how to go about troubleshooting this. I'd be grateful for any ideas. Thanks!