Hello,
Tried the upgrade to 10.0.2. No video at all after hour of green light on motherboard flashing. Re-imaged the microsd card with same file. Opened the cmdline.txt file on fresh image. added video=HDMI-A-1:1280x720M@60D to second line of the file. Reinserted card. Rebooted. Waited ten minutes. Got a message in the middle of screen that device would reboot.
Device reboots. Tv still shows no video. Shows only name of input. Guessing that means no video is being output. Board was flashing green with the solid red, but now only solid red. I can Samba into the RPI4 with explorer. PuTTy tells me connection refused. Guessing because it is a fresh install, ssh is not enabled by default.
TV was running on correct 1280x720 60hz. It is older, Im sure newer 1080 and such. Tried newer hdmi cable still same result.
10.0.0 still works. Not sure if copying a file may fix problem I'm having. The cmdline.txt file was same between two versions, so that file copying wouldnt help.
Thanks for any help.