Hi valholy, Since the 'Diagnostics' tests have passed, the hardware compoents are working fine. You can change the 'Sata Operation' mode in BIOS and try initiating the Operating system reinstallation once again. The following steps will help you in changing it.
5/23/2013 (Latest Version)
Keyword or Part Number
Find the Parts and Supplies You Need
Accessories for Your Dell
Find products to upgrade or enhance your Dell computer.