[CA] [CA11] Depth Sounder shows 0.0 then ---

[AndyKirby]

Hi guys, first post so please be gentle with me :-)

Not sure what is happening but when I power up the system, it's an integrated ST290 everything seems to be ok, with the Speed showing 0.0 but after a few seconds, maybe 10-15 it goes to three dashes ie '---'.

If we sail the system will periodically show a speed but again for only a few seconds, it seems accurate according to the GPS.

I did just install a replacement display but it seems to be configured ok for the system, slave and sail etc and plugging in the old one that worked ok, it just had a black mark in the center of the screen making it difficult to read, has the same effect so I'm pretty sure that's not the culprit.

Any help on trouble shooting would be gratefully received.

Thanks

Andy