I purchased a new Puck pro and a computer interface from Leisure pro last May. I have a little over 20 dives on it. On my last dive I noticed my battery icon was blinking. When I got home and accessed log book it showed zero dives. I contacted leisure pro where I got a number for tech assistance at Mares. I contacted them and left a message and was surprised that they called back, guy was very nice and advised me to return computer to leisure pro and they would return to them for service under warranty with a 6-7 week turnaround. Well, I live in Chicago, dive season is pretty short as it is, computer would be gone for the rest of the season and possibly be out of warranty before I get to use it again. I decided to try changing battery and updating firmware to V4. All went fine but computer seems stuck in bottom timer mode and I cant access dive planner mode. I wish there was someone that could advise me What else I can try to fix at my level or just exchange for a new one so I am not out the rest of the season. I plan to use it this week. I will repost my results when I get back