MR34 in constant rainbow cycling

[Fantasticmrfox]

I have a Meraki MR34 that just won't connect to the Meraki Cloud and is in constant rainbow cycling mode.  It worked before we sent it to the customer - tested it on our network - no issues.  The customer has a Spectrum Router which was tested to ensure it provided Internet Access.  But no go.  We ran it through a POE and then with its own adapter, but no change in behavior.  We even hard reset the device, but still no change.  I am miffed and looking for any insight into what should be an easy installation.

[BlakeRichardson]

Try a factory reset, the IP information might need flushing. 

[alemabrahao]

Have you tried performing a factory reset?

[Fantasticmrfox]

yup...tried....15 seconds pin press

[alemabrahao]

Then there is something on his network that must be blocking communication.

[Fantasticmrfox]

that's the conclusion I am coming to...The spectrum folks say No, but that and a cup of coffee...you know

[BlakeRichardson]

If you can access the local status page of the device it will say whats wrong to some degree. But as @alemabrahao suggested something upstream is probably blocking required ports. 

[Fantasticmrfox]

doesn't appear to be broadcasting any SSID to allow us to access the local status page.  My guess is that spectrum has closed down some TCP ports like #443