Every weekday at 5:59pm switched digital video channels become unusable for me, usually with a V52 error but occasionally V53. I think it's related to overlapping recordings (there are threads on that already).
Today I called Tivo support about this again and they quickly started talking about the signal strength and SNR being too high. We tried an experiment by removing the coax connection to the Roamio and power cycling it. When it came up, DVR Diagnostics was still showing ~17db SNR even with the coax unplugged. This caused the tech to immediately recommend a warrantee replacement of the Tivo.
I haven't seen this mentioned previously here. Sorry if it's been discussed previously.
Now how do I get my recordings moved to the new Tivo!