First, a electrical storm took out my ethernet jack a couple years ago. I have since been working successfully on WiFi.
I have had several occasions in the past where my TV could not find the Tablo. Each time I rebooted the Tablo and all was good. I had thought this was related to an update. Not sure.
This morning I got the same thing- Could not connect to Tablo. I tried the reboot trick without success. I tried connecting wirelessly directly from my PC to the Tablo without success. I even tried connecting via ethernet in hopes the ethernet jack would miraculously start working again. No such luck.
Good news is after several reboots I was able to connect to the Tablo via WiFi again.
So, if it is working why the post? I would like to know WHY. I am not sure if there was or was not an update. Can someone offer some advice?
Tablo Device 2.2.40
HTML Application 1.9.9 build 227 
Host Application 1.909.227