I have been having power issues with my MacBook Pro (late 2007?). The power cable had a dodgy connection, and kept cutting out. This destroyed the life of the battery to the point where it would only hold a charge for a couple of seconds. Last night it stopped booting up, so I reset the PRAM, and tried booting from a CD but it wouldn't fully boot.
Finally, today I attempted to turn it on using a working power cable and there is no life whatsoever. The light goes green on the cable when I plug it in, but the power button doesn't give any life to the computer, no screen, no sound, nothing.
I've tried booting it with the battery removed.
What are my options? Is it likely to be a motherboard or RAM issue? Can I use the hard disk in another laptop to at least recover files? What is it likely to cost in repairs in the Apple store?