Hello 

Really have little to no knowledge on this, but was looking for something to kill blackspots in the house's WI-FI. Got two M4 units and followed instructions. Connected to router,  paired with network and all seemed fine. I can connect to them when the primary unit remain attached to the router, but when i disconnect it, the primary unit turns red. Now i know I can leave it connected and make it an access point, but I thought I would be able to remove the primary unit elsewhere power it up and I could connect wirelessly to it. Now the dumb part. 

1) if removed from the router, does the standalone primary unit also need connected to a Ethernet cable? (see told you im dumb)

2) How do i fix it. I don't really want to buy a third unit just so it goes into AP mode.

3) i have a netgear extender, could this be causing conflict.?