Corrupted firmware Visteon VNR 9000

I've got a visteon VNR 9000 satnav unit with a corrupted firmware. Is it possible to fix this problem? Can I do this myself or should it be
done by an authorized Ford dealer?
Thanks for a reply.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.