I think solid red is "bad attitude status". Check the manual. It usually goes away. Maybe your Naza is bad, contact your dealer.
Blinking red is normal for un programmed NAZA.
Yeah, it's solid red, then when I plug it into the USB it goes VERY dim green.
I contacted the dealer but he's tough to get replies from (RC-drones).....screens phone calls, doesn't answer emails, barely answers pm's.