avic f900 sat nav faulty

[DEL_BOY]

hi

i changed my car yesterday and took my satnav out of my old car and into my new car today.

 

the prob i have is in both cars, whether its on dvd, radio, cd, usb whatever, it plays fine whilst the car isnt moving but when being driven, the whole unit cuts out around every 40 to 60 secs

 

this started about 2 months ago in the old car and is still the same in the new one

 

today ive been having a play around disconnecting various things, and ive found it all works fine if i disconnect the gps antenna !!

 

i purchased another gps antenna and fitted that to the unit, but still the same.

 

any ideas guys ?

 

thanks