The OP's question caused me to ACTUALLY read my manual from cover to cover for the first time ever:D.
Things I've learned so far:
When your mother house sits and you no longer have audible sounds between cycles and usage... do not assume she broke something and glide over the fact w/ your SO.
Press the "Custom Help" button (yanno, the one you've been glossing over for decades, that's located at the top of the panel?)then "2", then "Start/Stop". It will either turn sounds on or off.
Combo cooking....just hit me over the head and have done.
Still reading to find out if I can convection cook at at temperatures not located on the presets without my normal gerrymandered version;).
Reading really IS fundamental:p.