My external hard drive will not mount on the desktop?

My external hard drive no longer mounts on my desktop, the hard drive has been checked & is working-has anyone ideas?

Hello cuckoo55,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
Mac OS X v10.6: How to show your hard drive icon on the desktop
http://support.apple.com/kb/HT3746
In the Finder, choose Preferences from the Finder menu.
Click the General icon on the toolbar.
Select "Hard disks" in the "Show these items on the desktop:" section.
Close the Finder Preferences window.
Best of luck,
Mario

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