Boot problem (explain LED pattern)

[torid]

Hi Staff,

I have a NanoPi Zero2 which I've tried to boot using the latest (20250613 and 20250630) SD card images for Debian Bookworm and FriendlyWrt (24.10).

Boot is unsuccessful, for both images. The SYS (red) LED blinks (fast) twice every 1 second but device does not show up on the network (arp-scan does not show it). The device is stuck on this blinking stage.

Any ideas on how to resolve and get a successful boot? Or does this indicate a defective unit?

Many thanks in advance.

Best regards,
Torid

[DroZDi]

have you tried to boot with another image? if it goes the issue is in friendlywrt image. I have old one rk3528-sd-friendlywrt-24.10-20250324.img which was working...