Any news about your warranty? My board just died yesterday from nothing. using the serial to find out what is wrong, I’m receiving a lot of cpu errors and spontaneuous reboots, no matter what I do. Board from february the board is just useles from use only like a poe router and nothing more.
seems like i am now also affected. all was working like a charm, suddenly, only the red pwr led and a green sfp+ led. nothing blinking. did not yet test UART, will do this later. notice to me: i need a backup router …
Have you reinserted sdcard and changed bootswitches?
reinserted sd yes, also tried an old stable sd (backup sd), none worked. not sure what a vootswitch is?
thats all i get on UART:
Are you sure the bootswitches are set to sdcard?
Is the sdcard functional when inserted in laptop?
The bootrom does not find the bl2.
Which image are you using?
Do you have a valid image on emmc or nand?
i assume the new ultra stiff wifi cables pushed the pins up, you are right. i just switched them to 1:1 and now it boots
men, this should be really fixed in a revision. this jumper should be on board where nothing can simply change that. thanks!
i reassembled the device and indeed, they started to do the same thing again., Again, thanks, i would have never found that!
Thats why debug uart is important 
if you see bootrom board basicly works and simply does not find bl2,so either this is unacessible or bootswitches are wrong/not fixed correctly.
Bootrom → bl2 → bl31/fip/uboot → linux (kernel) → userspace (rootfs/initrd)