rns 510 black screen repair guide?

[JIMMYQ]

hi guys got a rns 510 which was working fine plugged in another car and just the screen lights up and nothing else it reboots no display nothing.. I have done the reboot procedure and tried everything else with it and I have been reading this is caused by a fault on the mother board I have opened the unit up and check all the ribbons too even swapped them from another. Does anyone know how to repair these and what the fault is please?

[Faraday]

First of all check voltages on coils.

[JIMMYQ]

hi thanks for the reply voltage seems to be ok on the 2 coils is this what normally causes the fault ?

[mobilart]

Send me the radio
Repair without any problems ..