Had one of these boards laying around that someone had diagnosed as DOA and decided to build a machine out of it for a friend. Took me about 2 hours to get the thing to post after assembling everything. however i found a page that was quite helpful, if anyone else reads this and are stuck with one of these stupid boards, try the following:
go to
http://www.intel.com/support/motherboards/desktop/dp45sg/sb/CS-031124.htm
1. !!!IMPORTANT!! make sure SPI_CON jumper is in correct place,
2. turn power switch off on PSU, or unplug the computer.
3. move the bios jumper down one pin
4. move the CMOS jumper left one pin
4a. (optional: remove the cmos battery)
5. turn the psu switch back on or plug computer back in, and press power button. it wont start up it will just have lights on. let it sit this way for 20 seconds.
6. turn power switch off on PSU, or unplug the computer
7. replace the jumpers to their original position, and cmos battery if you removed.
8. sweet success.
If this process does not work the first time double check jumper position using the link i provided (the bios jumper is not pictured, its shown in the manual and located above the front panel header.) Also be sure to try the process with the 4a step of removing cmos battery.
I tried every other method listed, this was the only way i could get it to work. AND it worked on the first try using the method above. GL to anyone else who got stuck with this board, hope this helps.