I have a "My Book" 4 TB external hard drive that I use for my media server. However I can't boot up my computer when this hard drive is plugged into the computer.
I don't know what's going on with my boot sequence, but when I press the power button, I see a black screen, and in the lower right hand corner a bunch of Hex codes pop up. I don't know the exact codes off hand, but it says something like "A2" then that disappears and "B6" takes its place then "F3" takes its place then blah blah blah until I see my Bios splash screen at which point I can press del to enter bios.
Well, when I have my external hard drive plugged in, my computer hangs at "B6." It never goes away. I never get to the bios splash screen, so I can't hit del to enter bios and make sure it's not trying to boot from the external hard drive. And if I unplug my hard drive to enter bios, then (obviously) the bios doesn't detect the drive, so I can't choose a "do not boot from this drive" option.
I'm assuming the issue has something to do with my motherboard/bios so here is that info. If you have any other ideas and need other info, just ask and I'll do my best to get it to you!
As reported by CPU-Z
Motherboard: MSI Z77A-GD55 (MS-7751)
Bios: American Megatrends Inc. V1.11 11/20/2013
And for what it's worth, I also have another external hard drive plugged in and the computer boots fine with that one.
Thanks for any help you can offer!