Also, is the PSU any good? You have four drives, I hope it's a quality-name 300W or higher, not a generic.
Try with no drives hooked up to the mobo OR the power supply, and see if it brings up the POST screen in a normal amount of time with the lighter electrical load. Additionally, many SOYO motherboards are designed not to POST unless there is an RPM signal being detected on the CPUFAN1 header, but you can hold down the Insert key at power-up to override this so you can go into the BIOS and disable the feature (it's called FOC, or Fan-Off Control). Or just make sure an RPM-signalling fan is attached to the CPUFAN1 header.