2.4ghz woes with RT-AC86U / Amazon used vs new

I recently purchased an AC86U from Amazon Warehouse, trying to save a few dollars in getting a "very good" unit that hopefully just didn't fit the original purchaser's needs. Unfortunately, the 2.4ghz radio seems to be dead out of the box. The LED light never lit up and the MAC address is empty for the 2.4 radio. I reset the unit a few times soft and hard, enabled/disabled the radio via the config settings and ultimately decided that I didn't want this unit to be my primary router because I...

2.4ghz woes with RT-AC86U / Amazon used vs new