20v applied to 12v my book external drive

I just plugged a 20v power supply into a my book external drive.  Did I kill it?  Is there a fuse?

The blue lights don’t light and the PC doesn’t see it.  Is there a way to salvage the drive data?

It probably burned a diode. Check this  http://www.hddoracle.com/viewtopic.php?f=59&t=1119&p=5033 about the only person who understands the boards is fzabkar.