I have the same trouble then you with my sound and same laptop. Did you find the solution?
No solution so far. No response from Toms' Hardware.
Meanwhile, what I did was to uninstall the audio codec (under device manager), re-boot.
On re-boot the codec is re-installed automatically. The sound also works.
Though the cause has not been found, this seems to work. For the time being
This has happened many times before, the sound starts working and then for no reason stops. Try it out & let me know.
All the best