Roamio Basic - 2 MoCa's Stopped Working - No Lights

I have a TiVo Basic with 2 Actiontec ECB200's MoCa adapters, one at the cable modem end and one at the TiVo, going to a tp-link 8-port switch, which fed Tivo, TV, Blu-Ray, Xbox and AV Receiver. It all worked just fine (2 green lights on) for a year. But this part week, no green lights, and no network. At the TiVo end, I removed the MoCa from the loop, went wireless with each box and it's running again without the MoCa. How do I test the MoCa adapters? Did one or both just fail? I searched for failed adapters, but didn't find process/procedure. TIA, Curtis