in the bios make sure the sata ports set to achi not raid. make sure there on. on some mb there 3 party sata chipset make sure your not on those ports and if you are those ports are on in the bios. on some newer mb if you turn on m2 or nvd sata option some of the ports turn off. also check in the mb guild see if putting a card in a slot will turn off the ports. use the working sata drive put it in each port see if the ports are working or fil they been shorted out. the old power supply may have killed the controoler on one of the sata device and it hangging the mb. try one device at a time.