SatNav disk read error!!!

[deebaa1]

Hi all,
i am new to this site and would like some help please.

i have a 2005 saab 9-3 1.9tid 150 with loads of factory option including satnav.

my satnav worked fine till the other day when my battery went flat, and once i started the car back up, the satnav keeps popping up with an error code. i have removed the disk and checked and cleaned it, and when i did remove it, there was a mark on the underside that was abit foggy. i have cleaned it off and placed the disk back in but the error code is still popping up.

everything else works fine, i can listen to radio, aux and the rest, and the satnav module in the boot is lit up and inserts and ejects the disk without issues, so cam anyone help me with regards to why it does not read the disk please...

Thank you...

[deebaa1]

is there any way to check if it is the disk or if it is something else?

Thank you