I have a zyxel nas540. It's occurred a problem that I cannot reached nas device IP.

ytncz

It's ok led's on device. But I cannot ping nas IP. Probably device not assigned IP. I've scanned network scope, but not founded any IP. I've just reset device (back to button etc.) but problem has continu. 

JockeSve

1. Tried both network ports on Your 540 (shutdown, change port, retry)?
2. Another cable (both ports: shutdown, change port, retry)?
Same result?