I really hate to suggest this but I think your best bet is to have this laptop serviced by a qualified service center.
I am not usually one to simply suggest this, but I have tried to find decent support for MSI brand computers but I will be the first to say that their product support really stinks!
Devices that use multiple product numbers for the same device makes doing research rather tough to do.
An example is your laptop is referred to as A6000 - 029US BUT it is also referred to as the CR600
such as the device listed here: http://www.msi.com/product/nb/CR600.html#/?div=Driver&os=Win7%2032
So which number is it, A6000 or CR600?
There is a total lack of available documents, such as owners manuals, let alone no service manuals, these make it completely impossible for me to use my knowledge and know-how with no service data available to use as a reference.
Sorry that I am at a total lose here with this particular laptop.