This thread was very helpful but my problem is new and not resolved. After almost two years of use I decided to hook up an external monitor to my 17in MBP (early 2008). I used a DVI connector, the resolution was not pleasant so I disconnected everything that day and went back to only the laptop screen. That night I disconnected the power, took the laptop outside to show some pictures then put it to sleep and closed the clamshell.
After dinner I came back, opened the clamshell and it never worked again. The battery was discharged, the case was very warm, the keyboard and audio are dead, the caps light will not work, only the sleep light is bright when closed and dim when open. Powering up causes the optical and hard drives to spin but no results with resetting any of the PRAM or other resets used in this post or on the Apple site. Plugging in another screen does not help but plugging in a DVI connector causes the fans to operate. Without that the case gets hot and no fans turn on. I thought this issue was resolved with software releases.
Upon checking TS2377 I found that the Nvidia GE Force 8600 GT board was acknowledged as having a large number of problems and would be repaired even if out of warranty by up to two years:
http://support.apple.com/kb/TS2377
I made an appointment yesterday, took the MBP in and after some testing the Genius said he could not confirm the Nvidia board was at fault. He did the same resets as I did with zero results. For a flat rate of $310 they will fix the entire MBP and if the Nvidia is found to be faulty I will not be charged. 5-7 day turnaround. TS2377 is an important item to read if you have already paid for an Nvidia repair because Apple will reimburse you if you had to pay for repairs for a faulty graphics chip under the terms of TS2377. TS2377 is dated mid-2008.