Hi everyone,
I'm currently having the same issue. I bought two HC-2 starter pack last year at the Springfield show and although I was planning to start using RailPro shortly after, life got in the way and tons of projects around the house delayed everything. I'm finally done wiring my layout and installed a PWR-56 yesterday. Because the HC-2 had been sitting in the box for a year, I'm having issues charging it. I left it charging overnight and, besides a very brief flickering of the screen, I still have a dead screen this morning. I pressed the reset button a few times to no avail. I'm having the same issue for both HC-2. Reading this thread, I noticed this:
"If you press the reset button and try to charge a HC shortly after pressing the reset, the HC will not charge properly. It will display "Done" charging and the battery charge indicator will show a full charge but it will drain quickly. Since the reset causes the HC to display nearly fully charged it will only allow a short charge and turn off (This is a safety feature to prevent resets and over charging)."
So I've unplugged the HC-2, press the reset button one more time and I will wait an hour or two before charging it again. Hopefully it will charge properly this time. I'll keep you posted.