OMG, the LVAD shut off

Heidi and I woke up yesterday to a frightening discovery.  The display unit for my LVAD had shut off. My first thought was OMG, my LVAD stopped AND I slept through the alarm.  I immediately did a self-test on my device and looked at the power unit to make sure it was still on.  We unplugged the display chord and plugged it back in and it came back on which was a relief.  It reminds me the first time I had a battery alarm I started shaking and couldn't remember what to do.  It sounds like no big deal as I write this but I can assure you yesterday morning it was no laughing matter.  Have to take my display unit into the hospital this morning for them to swap out.