In the CNET Laptop Troubleshooting forum, at the top is some bonus material but I'll take your word you can't find the manual. Why? Because Sony does not consider this an user serviceable item.
But many laptop drives can be replaced with standard notebook DVDRW drives and we choose SATA or IDE and we are done.
HOWEVER there are some that want that factory bezel and for those we buy the drive from Sony.
Where can I get a replacement drive for SONY VAIO Model PCG-81312L and the installation manual for it? Searched the web and can"t see one specific for this model. Thanks