WD Mycloud Mirror keeps restarting

Hi I have been having issues booting up Mycloud Mirror Gen 2 recently.
Upon power up with ethernet cable connected, the device automatically restart after about 5-8 secs and it keeps going on this start/restart loop.

However I noticed that when I unplug the ethernet cable, the device would continue to boot for
longer time and eventually restart as well.

Not sure what is happening. Any thoughts folks?