I'm sorry to say this, but I've got to throw in the towel wrt. these boards. I managed to get the OPi Zero +2 H3 image to boot, but even that only boots once. booting again from the same sd card doesn't work until I reflash the image onto the card.
I've fiddled with the OPi Zero +2 H3 fex, but haven't really gotten anywhere. simply taking the DRAM frequency, or even all DRAM settings from the OPi Zero +2 H3 fex & copying them over to the Beelink X2 fex won't make it boot.
luckily I can repurpose mine as boat navigation computers by using the Android side & the Navionics Android app (once I figure out which USB GPS puck & USB touch screen will work with this thing)
best of luck to everyone still soldiering on.
