24e7d3a5_FAQs___3M_ESPE_Suomi__Possible_Cause
[Problem] The handpiece has not been used for a long time and now it cannot be turned on. [Solution] Place the handpiece in the charger and recharge the battery. [Possible Cause] 
There is not enough charge in the battery to turn on the handpiece.
FAQs - 3M ESPE Suomi
Possible Cause