GPS Track Collection Will Not Resume

Well, after about six months of waiting my dad finally got his broken gps (Magellan eXplorist) replaced with a new model (Magellan Triton). The company was kind enough to send out this updated model for free. You can read previous posts over the past month to see how my experience with it has been. After further experimentation I have found that the unit will shut down for no apparent reason. It's not a power saving mode (since it has to do a cold re-acquire and the track it's saving has a jump in it), nor is it a timed option for an automatic shutoff (the length of time for it to shut off has been random as far as I can tell {could be moon phases?}). Because the unit turns itself off at random times on its own, it's useless to me. My dad could still use it for his fishing stuff (since he doesn't need the unit on for any more than a couple minutes at a time anyways), but he dislikes the unit for his own reasons.