I've tried all the suggestions for 11.7.202 and still no sound. I only use it to attend online class & have missed 3 classes because of that. It's a language class so I have to have sound. Wanted to revert to 10.3 (suggested by class website) but cannot view video or HTML in FAQ that explains how to do that.. Any written instructions on reverting would be great. I've got 3 more weeks of class so hope I can fix this soon. halfcher
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