Have you tried running Samsungs ESTOOL utility on the PC to test the HDD and its communication with the board? Did you also load BIOS default values for the motherboard before you attempted OS installation. You need to have at least BIOS revision 007 (preferably newer) installed on the board to support any of the comaptible 2.0 GHz CPUs it'll work with. If there's any antivirus option on the board to protect the boot sector (not sure if this applies for your board), make sure thats disabled when installing an OS.
Does the OS installation itself go through error free?
Please take a look at the system configuration of lloyd - DG41 WV wont boot window 7 with 4gb ddr3 800mhz ram...in this case the ram is 800mhz but still no boot with window 7, and problem in two computers, motherboard has some manufacturing faults, DG41 wv cannot support window 7 may be..