I used the Link twice with no problems. Haven't played in a while, and the battery is no longer charged.
1- How long should it take after plugging in to be able to turn it back on?
(I have been charging for over an hour)
2- Is it normal to be vibrating while it charges?
3- Are there any specific steps that should be taken to have the system be able to turn on again?
Sounds like you have do an extended re-charge. See 'Can't charge LINK'
Or, perhaps a reset will work. Try this first since it would be quicker. See 'How to reset Golf Pad LINK;
Also ensure that the on/off button doesn't seem stuck. See 'Power button not functioning properly'