HDDs not recognized in BIOS

kevinrd

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Feb 4, 2016
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4,510
I'm not sure where to start so I'll just go for it.

I've been building a new PC, here are the specs:
Mobo: MSI 760GMA-P34(FX)
HDD: 250GB Seagate Barracuda 3Gb/s 7200.10
CPU: AMD FX-4350 Quad Core @ 4.2 GHz
RAM: G.Skill Ripjaws Series 8GB(2x4GB) Dual Channel DDR3 1600 MHz
GPU: An old 256MB ATI Radeon card I'm using until I order a new card.
Optical Drive: Phillips DVD drive I salvaged from an old computer.
500W PSU

When I boot up the PC, everything seems to work fine. The BIOS loads up, recognizes the CPU, RAM, GPU, and DVD Drive just fine. When I go to into my CMOS settings, the HDD does not show up as a SATA device. It did show up as a device during the first few boots of the PC, but it stopped and I haven't been able to get it to show up since.

What I've tried:
To see if the SATA ports were bad, I tried plugging the HDD into all of the 6 SATA 3Gb/s ports on the motherboard, none of which worked. However, the DVD drive shows up on all of them, so the SATA ports are working fine.
To see if the SATA data cable I was using on the HDD was bad, I tested it on the DVD drive, and it works fine. To see if the SATA power cable was bad, I did the same.
So I thought it must be the hard drive causing the problems, but when I put in a working hard drive from another PC, it wasn't recognized either. I put it back in its original PC and it worked fine.

I can only assume the motherboard is having problems. From reading about other peoples' problems, it might be the SATA controllers, but I'm not sure. I read something about resetting the motherboard's BIOS, but I don't know how to do that on my motherboard and I can't find anything about it in the mobo's manual, so if someone could let me know that would be great. Right now I'm afraid I might have to RMA the mobo.
 
Is SATA set to AHCI maybe ?
To reset CMOS/BIOS, unplug computer, push start button for few seconds, find battery on the MB and between it and the buzzer there are two pins, marked JBAT_1, short them out for few seconds. Plug in and start computer.
 

kevinrd

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Feb 4, 2016
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4,510
I figured it out. My PSU is top mounted in my case, so naturally it's mounted upside down for airflow. The voltage switch on the power supply was set to 230v (the standard in Europe) when it should have been set to 115v (U.S. standard.) I thought it was switched the right way because the PSU is mounted upside down, and it's a vertical switch. I'm not sure exactly how it works, but for some reason the dvd drive was able to be powered, but the hard drives weren't. After switching the PSU voltage to 115v, everything works fine. Thanks everyone for the replies!
 

kevinrd

Reputable
Feb 4, 2016
3
0
4,510


Yeah, that probably would have broken the PSU, and maybe even some other components.