I am trying to get information for a local repeater owner who has been having issues with his IC 718 which is the remote base on his repeater. The issue started a couple months ago, and has now happened four times in total. The radio locks up and becomes unresponsive and requires someone to go to the repeater site to power the radio off and back on. The power supply has been swapped out, and it has also been ran on batteries. Today the 718 locked up, and a few hours later it seemed to unlock itself and began functioning normally again. I saw have seen one or two other instances of IC 718's locking up, but the symptoms were not exactly the same. In at least one of the cases it was failed diodes that were later replaced by Icom. I just wanted to see if anyone had any thoughts on it.