CD changer not working - No power?!

[Monaco Sean]

ALSO IN FAULTS SECTION

Recently bought an early 2002 172.

I noticed the other day when cleaning it has a CD changer under the PAS. seat, good news I thought..... But its not working!

I assume they use the same fuse as the Headunit? which is OK
Also checked the plug at the back of the headunit & under the seat.. OK

No idea what else it could be!??

I cant even get the cd casette part to eject, as if theres no power.

Thanks in advance!