HP Pavilion 15 Notebook PC updated to Windows 8.1 as recomended by the installed HP Support assistant
There is now no sound from the internal speakers but when connecting external speakers to the output jack they give sound.
I've followed various sets of instructions to update drivers / roll back driver all have failed.
The drivers installed are currently Realtek High Definition Audio Version 6.0.1.7071
Any body got any ideas?