I have a MacBook pro and it won't turn on. Basically I press the power button and the White light at the front turns on. Then a few seconds later it just crashes and the White light goes off then the laptop turns back on but just seems to be stuck you can hear it and the White light stays on (not flashing like in sleep) and that's it. It just stays like that no screen or keyboard lights, nor the Apple logo. I have tried restarting it and tried holding all the key combinations that the apple site suggest, but still it doesn't work. I've tried it with the power cable plugged in and without. It's a 2008 model 15".
I spent ages saving up for the laptop, and if you've eve had a problem with your mac you should know how worrying it is. So any help no matter how big all small would be very welcome. And I'll add a bounty for all my reputation if answers start appearing.