intermittant loss of audio ,with a AUM-41FF DTC code
 

It's me again with my 04 Volvo s80 T6 ,
As expected with a car that has over 210,000 miles on it ,
problems will pop up ,
After suddenly losing my audio I turned off the radio for a minute,
the speakers started to work again ...
I decided to hook up my scanner and pulled up DTC AUM-41FF...(Amplifier ,sub-antenna ,signal missing)
I replaced the 30 amp fuse for the audio amp hoping that would fix it
there was some oxidation on the fuse,but if this doesn't correct the issue
would I need a new amp?

any help on this matter will be helpful

Thank you

Also Want to get DVD player to work..
 

I also have the built in DVD player(located in the center console with the head rest monitors ,can't seem to get it to work (no power)
Can't seem to find much info on it(think it's a Volvo product )

is it a bad fuse somewhere ???

any help on this matter would be helpful