Just a quick note to add myself to the list of people who can recommend Pete ('g0pkh') for his PSU repair services. I sent my radios off a very short time ago (three of them!) and he provided a very swift turnaround. All radios were returned in full working order and he was most polite and courteous along the way.
I have been down the route of returning radios to Pinnacle (the same three that I bit the bullet and let Pete repair) and my opinion is that the units do not have the PSUs replaced with a correctly specified unit. The entire radio appears to be just swapped out and if this is the case, you may well suffer the same problem at some point in the future.
I am looking forward to a few additional years of service from these units and should my fourth radio die, I know who I will be sending it to.