I think bitmain mines them for two months to weed out bad ones, I would be surprised if they shipped more than a few rejects per batch.
OP it sounds like you have a control board issue. Can you swap the miner over with one on a working setup - meaning use the power supply and Ethernet cable from a known good unit to prove the problem is not from power noise on that supply.
I have 2 out of 4 working now, plugged one in which i played with for hours last night and it powered up ?
The issue is the boards, they are not going through self check/autotune, no solid leds, then no flickering leds, then they are supposed to flash board 1, board 2, board 3, bit more flickering and then ON solid and green NORMAL status led flashes on I/O board..If not then ur stuffed ??