Have blinking lights on all ports at back of unit
Unit stopped working and now have blinking lights at back of unit.
iMac, Mac OS X (10.7.3), Correct Stickies Database Location
Unfortunately, this is a symptom of a failed or failing internal power supply.
If the device is in warranty, take it to an Apple store....if you have one in your area....or contact Apple Support directly. http://www.apple.com/support/contact/