Is this still the accepted solution all these months later? (I found post from 2015 with a solution that involved uninstalling Intel drivers and reinstalling Realtek drivers and Intel Graphics Drivers. I don't know how to reference that discussion here.) Aspire TC-605 running Win 8.1. There are NO AMT Intel graphics driver as described in the solution and the Intel products that might be uninstalled are currently: Intel Control Center, Intel Graphics Driver and Intel Management Console Center. I can't find AMT-Intel_22.214.171.1240 and my Intel HD Graphics group is 4600.
Problem, however, is the same - no sound from speakers. There are NO exclamation points on any devices in device manager.