Sound device not found. Rebooting or resetting NVRAM did not work
My device: MacBook Air 13 inch, 2015
1.6 GHz Dual core Intel Core i5
8 GB 1600 MHz DDR3
I tried NVRAM reset. People tried this method say that start up screen shows up a few times while they pressed option+command+P+R for about 20 seconds.
Is contacting Apple Support the only solution at this stage?
MacBook Air 13″, macOS 10.15