I believe, through searching, that this is an Accton.com.tw (accton.com) product. Having trouble find this model, is it old?
Probably doesn't have a power switch. I found a manual for 3016A:
And it just says plug the power cord in.
* Anyway why would you need a power switch for a switch-hub? Once it gets plugged in it pretty much stays on all of the time.
Of course you have no power. You're unit is probably dead for some reason or the other. Maybe you could open it and look for a fuse or other power supply problem? Assuming you have no warranty on it. If you do have warranty then you should pursue the warranty path for help with it. They seem to have USA support information.
P.O. Box 51420
Irvine, CA 92619-1420
Phone Numbers -
Sales: 949-707-4800 or 888-398-2101
Support: 949-707-4847 or 888-398-4101
RMA: 949-707-4828 or 888-398-3101
"Why couldn't you just find a nice Japanese Girl like all of the other white guys here?" --- Quote from the movie Fast and Furious: Tokyo Drift.