@Kevin_Z I tried the hardware reset, but nothing changes, no LED blinks and only the power LED remains on. Here is the label and the power adapter. I bought it on amazon, it should be the original...

Newly bought. All the LEDs will be on for a second, and then all off except the power LED. I plugged in the Ethernet cable in the LAN port and the Internet port and the LEDs remain off, but my...