WD MyCloud 2TB can't be waked up

I installed WD MyCloud 2TB, it works fine for couple days until today, I open WD MyCloud Dashboard from my PC, it only shows MyCloud firmware version, and NO other inforamtion. I realize the front LED is pulsing blue(indicate it is standby mode). I can access the share folder with no problem, but I can’t use Dashboard. Please help… Thanks!

What is the firmware version? With the F/W v4, the UI can be extremely slow to fill up