Volvo Sat Nav problems - can it be cheaply fixed?

[Igg]

I've got a V70 with the factory fitted sat nav that rises out of the dash. It's recently been getting slightly sporadic in it's ability to read the disc and has finally decided it can't read the disc, so just diplays an error message to that effect. local dealer has 'had a look' and can't say what's wrong - disc looks unscratched, and when they cleaned the player it did work a bit more reliably until now.

So, I was wondering, apart from buying a TomTom or similar which I'd rather not do, does anyone know how easy/cheap it is to replace the disc player in a V70 so that I can still utilise the steering wheel controls and nice dash monitor?
Thanks
Igg

[Igg]

right - judging from the lack of replies, I take it the answer is no it can't be!

Oh well, off to buy a TomTom then.

Igg

[Igg]

thanks - will try giving it a wash and clean the device as suggested.
Igg