Anyone technical know what the problem could be with Bid and the sound (or lack of it)?
Numerous things, including sound desk power supply, sound desk set up (if digital), audio routers / matricies, configuration problems on codecs or even finger trouble when trying to get things up running in a hurry resulting in something accidentally getting unplugged.
There's so many things which can result in lost sound that unless it something obvious (like flames coming out of the back of something) the only way to fix it is generally to trace the entire signal path and see where the sound disappears. Then you get that fixed, and discover something else has changed and you now have horribly distorted or humming sound which you still can broadcast and the hunt starts again. All while you have production and management shouting at you for not being quick enough!
By the looks of it they've been hit by one of Murphy's collalary laws - everything that can go wrong, will.