HT3964 my mac book has no any response to turn on, how can I reset SMC?

my Macbook Air won't turn on, no any response,  took out battery just plug in cord, the green light on, but Macbook still no response at all,  were told to reset SMC, but the instruction said to put Macbook to sleep ???? it is totally dead how can i follow the instruction to reset SMC?

Oop, bad battery, took it out and plug in 45w magsafe, did not work on 2006 MacBook Air,  change to 60w magsafe, and I cound turn it on.

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