Is my three sisters dead?

just friends landed last night. I was eager to send it’s related outs, mixed through three sisters. unfortunately, found that my three sisters seems to be dead. no sounds, no pings, nada.

it had been a few months since using this case. out of concern tested all other modules (everything seems to be OK) with the exception of three sisters. anybody have any recommendations for troubleshooting? …strangely another member on MW is having the same experience. @Galapagoose HELP!