Over the last few years Microchip has manufactured and sold tens of thousands of the MPLAB ICD 2 debugger so we do get a few issues from time to time .In order to help our customers fix these issues quickly we have created a dedicated support page that trys to help customers get 'rolling' again.
If all else fails and the ICD has been damaged or is faulty - this site can provide a route to get a replacement unit. Please check out www.microchip.com/cisar