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We have a V1.1 which has been working fine for a very long time - but suddenly it's now frequently going into a fit where it's online for 1 second, then off, then on then off - repeatedly. A power cycle fixes it.
I verify this is happening just by watching the WiFi connection on my iPhone - it pops in and out. and I can't communicate with our Tivo (among other things)

I went to see/copy the logs but all it shows is the latest power off and power on - everything else in the log is dated 2015. no "errors" see attached.

So the question is - if it continues to do this is it DOA? It seems we've had bad luck with routers - none ever seem to last more than a year or two.