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If the "Button" means the one on Remote Controller, you can try to find the battery inside the Remote Controller.: p6 s: R4 Z- P: h8 t
In most of cases, there is a screw on the cover, sometime the screw might be covered by label. If the Top/Bottom Covers of Remote Controller are not secured by screw, then you can use fingernail or screw driver to open it.5 o5 Z0 N8 k- U% d, l8 a+ U
% T3 B- r8 j i8 S4 K+ E2 x; L4 iIf the "Button" means the Up/Down Switch inside Garage, then thing might be more complicated. Basically, you need to check the electric circuits by multimeter. |
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