Thanks for your response. I this case don't think the switch is the problem but in a lot of cases, it is the switch because it is the only mechanical component. This flashlight is such a low cost item that I really doubt they would have put any addition circuitry in it. On higher cost units you could be correct. I did a little more digging and I think there are some micro transistors that they are using as switches that may have failed. I am removing the circuit board so I can draw a schematic some I can better trace the circuit. That's why I didn't show a repair in the post.
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Ohhh ok. Well, if you could share the scheme of the circuit, I would like to take a look, I am interested in the operation and I want to understand it in a circuital way. :D Thanks for sharing.
I will. As soon as I can get it done, I will post. Thank you for reply.
I probably won't have time to work on this for a few days. So I found a link that gives some schematics for a similar light. Hope this helps.
http://www.instructables.com/id/Shake-Flashlight-1/