Problem With Sound , Win8.1

I have a problem with my sound 

I own a HP G60 630us Notebook.

I've installed Win 8.1 more than once, but there is a problems with sound in the Win8 And screen , but in Win7 there is no problem .

1- When i open the system for first time or restart it , I find no problem with sound , but when i do any of the following things:

Sleep
Sign Out
Switch User

And login again , Sound stops working .

2- Sometimes when i close the laptop screen and open it again , there is no screen view to me just black screen ?

Are there solutions to those problems.