LocalFart

Update: It was an AHCI Setting in BIOS that was disabled

I was updating my CPU's in my acer altos G540. Im running DSM 6.1. has been running fine for months if not years. CPU's had issues so I rolled back to original CPU's but not I have the screen saying 'No Hard Drives found on DS3615xs" HDD's are pick up in BIOS, everything seems to be the same. Is there anything I can do?