Why is my MacBook not turning on?

Hello,

I know there are many other questions about this but I want to double check that the Magsafe Board is the problem. I use my MacBook Air 45W charger and bought a MacBook Pro 13" Late 2011 secondhand. The charger works on my MacBook Air.

I tried to reset the SMC and NVRAM. But also mesure the voltage in the magsafe board but no power at all.

The MacBook wont turn on or charge. The charger light is off not green or orange and it do not deliver any power. I measured the amps from my outlet:

• When charger is disconnected from computer 0,005-0,007 A
• When charger is connected to MacBook Air Mid 2011 0,275 A
• When the charger is connected to MacBook Pro 0,007 A

When I first opend it was pretty dirty. I cleaned it with alcohol and most of the dirt is gone but still some that I cant clean away. There is also a little bit of rust on the Logic Board. Can it be water damaged?

I wonder where the problem is on the Magsafe board or logicboard?