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blue/green light on liftmaster 8550W and won't connect to MyQ Gateway...

have the liftmaster 8550W door openers - 2 of them.  one works fine and connects to the MyQ Gateway so I can open it remotely from my phone.

The other door functions properly from the remotes and the keypad....however, on the opener itself, the button in between the up/down arrows is flashing half blue half green....and that door won't connect to the MyQ gateway.

What is causing this, and how do I fix it?  I've tried the triple reset.  To no avail.  Can reprogram the remotes again, but same thing still happens. 

Blue/Green light is flashing on that button.  Read in the trouble shooting book something about it is attempting to connect to wi-fi, but have no idea what that means, or why it's doing it, or how to stop it.

Thanks for any help you can offer!

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