How to check Battery:
Attach multi-meter testing pen to both end of Battery, measure 3.2v after fully charge. Replace it if the values lower than 2.5v.
If Regulator works well, replace the Timer Crystal (2) at priority, follow by Timer Chip (3).

**The Timer Chip must be purchased from FingerTec. Provide the model number of the fingerprint reader to FingerTec upon placing order.