Pepwave AP Pro AC

Hello,
I hope you have a good day.

I have Pepwave Ap Pro AC and the problem is I can NOT access it through LAN/POE or either via WAN interface.
It doesn’t get an IP even by DHCP server or by its labeled IP. I tried countless solutions but couldn’t work.
I wonder if there is any way to hard reset it, yet I found no button or note on its case.
Thanks in advance.