ISSUE:
No sound can be heard when attending a Zoom Meeting.
ROOT CAUSE:
Both Mic and speaker are disabled.
SOLUTION:
Enable the laptop Mic & speaker of your PC.
STEPS:
1. Look at the F1 and F4 of your keyboard.
2. Ensure to toggle off both the F1 & F4 keys to OFF.
NOTE:
3. As additional check, Goto Zoom Meeting's Setting > Audio.
4. Ensure that you have set the correct Speaker and Mic for your current Zoom Meeting.