I got a used GR8900 last week, not working but for very little money. I put a new CTL1616 battery in and did the AC Reset although it took 7 attempts to do it.
I have been charging the watch in the conservatory and outside since Saturday morning but the CHG letters are still flashing and I am still unable to even change the time. There is no sign of L/M/H next to the battery symbol so I have a feeling the charging circuit is goosed!
Should I leave it charging for longer just in case?
I am happy to put a CR1616 in it to get it usable if that's the case, only if others think it's had it 'Solar Powered' day that is.