My TZT2 has been good. No issues. I did the most recent update when it came out and used it for the first time today. Everything was fine until late in the day and it turned off by itself. Turned it back on and about an hour later turned off. Each time it turned off, I turned it back on and the last 2 or 3 times it did it, it didn't stay on for more than a minute or two. The last time I turned it on, it clearly was having a hard time coming on. The FURUNO logo flashed multiple times, the progress bar page came on then went off a couple of times. It finally turned on and lasted until we got home. Then, it could not be turned off. Any ideas?