MacBook not switching on, only hard drive spinning
When I try to switch the MacBook A1278 on, I can hear the hard drive spinning but nothing else seems to be powering on.
There's no sounds at all, and the only light that comes on is the green one for the webcam, which flashes once when the power button is pressed.
When I connect it externally to the tv, the tv recognises that somethings attached but shows no picture.
I've tried changing/removing the hard drive and RAM, tried all the recommended suggestions such as resetting the SMC/PRAM but there was still no difference. So I assumed it must be a problem with the logic board...
I've just put in a different logic board and still have the same issues. Any help would be appreciated, thanks.
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