skywagon8a
MEMBER
SE Mass MA6
I have a CNX80/GNS480 in the 185 linked to a MX-20 display. The CNX80 screen suddenly went intermittent, now nothing. The back lighting on the buttons has done the same. The button back lights seem to be on two separate circuits as those on the right column seem to be separate from the rest. The radio is working as the map on the MX-20 is indicating correctly and I can hear the radio talking, just can't see the numbers on the screen. It also seems to do it's self testing correctly as the appropriate indications appear on the HSI.
I took it to a fairly new large radio shop in PLY where they didn't even want to look at it. Said that they would send it to Garmin. Seems to me that they are only interested in doing expensive installs. I suspect that there aren't any experienced avionics technicians working there. There were a lot of young faces.
This is the manual: https://www.manualslib.com/manual/846491/Garmin-Gns-480.html?page=1 The display is supposed to have a life in the 20,000 hour range. Since the switch back lights are also acting up I'm suspecting an internal connection of some sort. I can not find any reference in the manual for the troubles.
There is another shop further away that used to have some good old timers, if they are not retired.
Any ideas welcome. Does this really have to go back to Garmin or should a "real" avionics guy be able to solve the issue.
I took it to a fairly new large radio shop in PLY where they didn't even want to look at it. Said that they would send it to Garmin. Seems to me that they are only interested in doing expensive installs. I suspect that there aren't any experienced avionics technicians working there. There were a lot of young faces.
This is the manual: https://www.manualslib.com/manual/846491/Garmin-Gns-480.html?page=1 The display is supposed to have a life in the 20,000 hour range. Since the switch back lights are also acting up I'm suspecting an internal connection of some sort. I can not find any reference in the manual for the troubles.
There is another shop further away that used to have some good old timers, if they are not retired.
Any ideas welcome. Does this really have to go back to Garmin or should a "real" avionics guy be able to solve the issue.