first KiwiJochen

thank you for your quick reply.

i've got v32 now and ill try to downgrade to v29.1 since the navigation often reboots but ONLY when navigating, not when driving ni map-mode. I think it may be something to do with Gyro. I will also do CodeDefaults in NavCoder today to see how to do it. I wanted also to check wiring and is there any way to do that?

MAybe to get out MKIV unit and try to re-insert all the cables? Do you know which specific cable is that?

Secondly, do you know where on the motherboard the EWTS82NM21 chip needs to be replaced and where it can be bought?

AND to be sure, the MKIV unit is the unit with the DVD reader back and nothing else(where gyro should be)?