Try to put him on option 1 and maybe will appear.
Or if not, try to connect extra beolab speakers and see what will happen.
Or try to reset to fabric default. Menu + 00 + Go , and than monitor service menu and than reset to default.
But be carful last one will erase all your chanels and settings ...
when your Black Label begin to taste like juice just take shot or two of Absinthe and
after that quench with some vodka, if you still feel juice like take beer
with grappa !