Just found this thread and guess I can join in now.
I acquired a Quarq Cinqo Saturn Compact recently and only managed to get 2 rides out of it before the transmitter completely stopped sending Power readings to my Garmin Edge 510.
During those two rides, the readings kept dropping throughout the sessions. When it came to the third road ride, it worked for half an hour with jumpy readings though the 10s average seemed pretty normal. After a quick coffee stop the the 30 mins mark, the readings completely came to a crashing halt and has since stopped transmitting.
I have tried using Qalvin to get it going but it simply won't transmit despite being detectable by my ANT+ cellphone and the Qalvin.
So, what should I do now since Cinqo Saturn is no longer supported by Quarq and they are asking me to get a replacement Riken or Elsa. Until then, any tips to revive the powermeter or just a case of electronics gone bad?