You don't need to short NAND pins to flash LE, this is a way to unbrick the box with USB Burning Tool in case you bricked the box with wrong u-boot.
My advice is: you LE from SD card for now and wait for next(-ish) build which should solve that kind of issues.
No logs = no idea.
new to this...must of messed up uboot as only way to get to recovery is nand pins..now flashed to nand but power off..reboot issues continue..
only way is to pull lead..how do i provide logs.