BANANA Pi m3 no boot


I bought a Banana Pi m3. And I formatted a SD Card, I put an OS image on it and I tried to use with the banana. But the banana had no reaction, red led shine, but the banana no boot. The store that sold me this banana, says that I must use a DC charger 5V-DC-Jack (4,0 x 1,7 mm), max. 4 W. My question is, can be a problem when I used a charger with 5V and 2A? Or?

I wait for an answer!

Thank you!

Best regards

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