No sound

Make sure you have not accidently muted the radio try switching on / off . If not that , heard of some curing this problem by disconnecting battery neg terminal for 30 minutes .

Ive tried muting unmuting, off and on, turnwd off thw car locked it and left it for over an hour.

Pretty much anything which isnt electrical or mechanical as i have no idea how to do any of that.

Better leaving alone if you are not sure and get someone else who knows what they are doing or your garage to look at it .