Apple A1278 Fan spinning to max

[Eleways]

Hi

I've an A1278 macbook with a 820-3115 motherboard. It's working fine but the fan start to spinning to max after few second from turn on.

This problem start after we try to use the original keyboard of the customer. I discover after that this keyboard was damaged by liquid.

Before this, the fan working fine.

Any idea?

thanks for your help

[mon2]

Re: Apple A1278 Fan spinning to max

Your sensors must not be working.

Power down.

Remove the keyboard.

See attached and using tweezers, short the pad to ground. There will be one pair on one side of the board and another pair for the other side of the board.

This shorting mimics the ON/OFF button of your keyboard.

How does the board behave without the keyboard?

[dellxps15]

Re: Apple A1278 Fan spinning to max

if it had sliquid spill on keyboard and has fan spinning to max i would try also another trackpad with good trackpad cable.