Here is what may cause your garage door opener to not power ON:
-walkthrough(老花镜);
2018-12-25{418}(#11854492@0)
Here is what may cause your garage door opener to not power ON:
1 – The transformer has failed due to a power surge.
2 – The glass fuse on the circuit board has blown or popped.
3 – The circuit board itself is faulty.
4 – A wire or wire harness is loose or burnt.
5 – The end of the electrical cord has become disconnected from the opener terminals.
6 – The electrical cord itself is damaged.
7 – Bad capacitor.
Thank you very much. I disconnected the circuit board and can not see any abnormal. See the attached image
-jameschen6(梦想农庄-因信称义);
2018-12-25{61}(#11854565@0)
Thanks. See the attached. The black item seems to be plastic instead of metal and at same location outside case is a light
-jameschen6(梦想农庄-因信称义);
2018-12-27{61}(#11856184@0)