I've not noticed any discolorations on my MBP screen. I don't know who made it or how many weeks ago
I had a problem with my Airport Extreme (AX) one night. It just failed to connect properly. It so happened there was a software update in the queue for it. After connecting by cable, installing the update, and rebooting, it fixed itself.
I've also had issues where I lose the network going too far away in my house, and having troubles reconnecting. For that, it seems that turning off Airport, rebooting, and restoring Airport will restore my AX access.