Led comes on but doesn't boot, screen and keyboard stay black.
Laptop was working fine, shut the lid then next time I opened it nothing happened.
I tried holding the power button to shut it off.
If I press the power button to switch it on the led on the front of the case comes on, so does the fan, for about 5 seconds. Then 5 seconds later they both come back on again but nothing else happens. No screen, no keyboard back-light.
I've shone a torch through the back but there's nothing happening on the screen so it's not booting.
The battery charges fine, I've tried a SMC reset and I see the led on the magsafe adapter change colour.
I've swapped the ram with a spare set but no different. I've removed the hdd and that works OK on another machine.
My guess is the logic board has gone but interested in any other suggestions. I read somewhere that the fan wouldn't come on if the logic board was faulty but not sure if this is correct.