BIOS Not Detecting My Hard Drive

[memeguy420]

While I was in the shower about 30
minutes ago, my computer randomly restarted. After powering it back on, it said no boot device found. I went into bios, and my system clock had been reset to January 1st, 2013. After fixing that, it stsrted perfectly, but It wont connect to the internet. it says it's connected, but it can't load any web pages. I'm suspecting it's a dead cmos battery, but It's been working fine for a year and a half! I just put in a new GPU and it's been working fine for 3 days, up until now! I attempted to do a system restore, which put me into the automatic repair loop. After Trying to fix this, my computer began doing the infinite Repair Your PC Loop, and when trying to fix that, I realized that my BIOS isn't even detecting my HDD. I've tried using 3 different possible connections from my PSU, but all to no avail, PLEASE HELP!

TL;DR: Tried fixing Automatic Repair Loop, now HDD isn't being detected.

 

[Mac070]

What did you have open or what was one the screen when you left ? Also take out that gpu and see if there are any changes

 

[ffg7]

replace the cmos battery. http://www.tomshardware.com/answers/id-2885137/urgent-bios-boot-order-detecting-hdd.html

 

[TomPlum]

Yeah try resetting the CMOS (Removing the battery on the MB and replacing). You'll lose any overclocking/custom profiles/date/time. And try changing the the SATA port on your MB. If you have SSD/HDD/Optical Drive. You want the SSD in the first port, then optical drive in the next, then your HDD. If your boot drive is just a HDD, use the first SATA port.