Anyway, there are USB power meters, it may be a good idea to connect the Pro1 through it to see if it is charging (or if there is any current flowing through the cable).
This would be good to filter out battery / charge-related problems.
As for charging, it should have some significant current but when it is charged, the current should drop significantly.
If the software cannot be started, the charge indicator will not be driven, but charger circuit itself is working at a basic level.
Maybe one discharge-related problem may happen when the loader is set to boot up the device on c