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.