TZT2BB and TZT15 shutting down on their own

[CaptJD]

I have the BB and 15 on same network and both units will randomly reboot on their own. All connections are secured and firmware updated to my knowledge. Any help would be greatly appreciated.
TZT2BB: 1950152-09.80
TZT15: 1950152-08.01

 

[TheReaper]

Do they both have shielded Ethernet cables (with metal plugs, not plastic) going to a switch AND both have NMEA2000 connected? If yes, then try looking at the Home-Settings-Initial Setup-PGN Output settings and ensure that only 129283, 284 and 285 are turned on. Then, look at Home-Settings-Initial Setup-Data Sources and ensure that the sources don't jump around (change randomly). If they are jumping around, there is a problem on the NMEA2000 bus. If not jumping around, then ensure that your power and grounding is good.

 

[Johnny Electron]

Sounds very much like an onboard power issue. You might take a power supply onboard and power the units independently from the boat to see what happens.