Seagate Go drive will not show up in Finder anymore but will boot up

For some reason, my Seagate Go drive (portable USB power hard drive) will not show up in Finder anymore. I can however see it on bootup and actually boot my backup on that drive. The last time I backed up was before I sent my MBP to Applecare to replace the logic board (fried video).

I thought it may be a power issue, but the drive doesnt work in either USB port and it doesnt make the beeping noise that it normally makes if I plug it in a USB hub (which cannot power the drive correctly).

Any ideas why the drive will not show up?

Update:

I left the drive connected and a window finally popped up stating my drive was unable to be repaired and I should back up the data ASAP. I am backing it up on another drive now.