MacBook Pro - 2.5" Hard Drive Power Right not Left

I have an external 2.5" hard drive that powers off the USB. I used to be able to power it off either the left or the right side USB port, but now it only seems to power up on the right side (although USB key fobs work fine on either side). The green power light does come on, and the drive appears to be attempting to start, but it never quite gets there.

Is there anything different about the power that comes off of these two ports? Would this be enough to get a technician to replace the USB port? Is that even worth it?

Thanks!