Mac laptops forum: MacBook Pro turns on but won't boot, CPU hot

Sorry to say, but this thing sounds like it's toast. At first I was hopeful there might be a small glimmer of hope in that it was one of the nVidia boards that you might have a shot at getting replaced free, but every time I've seen what you're describing, it's been new MLB to fix.

Still, you can hope you'll get lucky, and try each RAM module individually in each memory bank. There's always a possibility of the RAM having gone bad, and while it's a very distant hope, it's about all you've got at this point.

Since you don't have a whole lot to lose, you could probably take a look at the iFixit site for a guide on taking the thing apart. You could try disconnecting some of the internal bits and bobs, though there's really not much to disconnect on those besides the ODD and some sensor cables once the top case is off.

As long as there's no liquid damage or anything like that, the unit should be eligible for Apple's flat rate repair service. About $300, give or take, and they'll fix pretty much anything that's wrong. There are a few little catches, but barring liquid damage or drop damage, it's pretty unlikely you'll run into those. Apple's depot isn't actually run by Apple, it's a company called Flextronics, but they are required to meet Apple's standards. Like any place, sometimes your unit gets worked on by someone who's pretty green, but they have to warrant every unit for like 90 days, so you can at least get it fixed again for free.

I've had the EXACT same issue happening with my macbook pro (same vintage). It's gone on for a few months; zero response for usually 3 days and then, suddenly, it'll just boot and run as good as ever until it's battery dies or gets shut down for some reason. I can't close the lid and I always leave it plugged in so it's become a desktop of sorts.
This started right after I put in a SSD and new RAM. I switched the RAM out but it continued. Annoying that it runs awesome for days on end and suddenly I'm computerless for three days.
I'm hoping you've got some good news for me! Thanks for any help.

I've just found this post because the exact same thing has happened to my Core 2 Duo 17" MacBook Pro today, also about 4 years old. I've tried everything I've found on various forums to wake it or reboot it, but no joy. I can't even get it to run in target disk mode. The only thing that gets some kind of response is pressing Shift, Ctrl, Option and Power for 4 seconds.When I do this, the status light on the lid catch flashes rapidly and then goes out. The machine then won't power up at all. Pressing Shift, Ctrl, Option and Power for another 4 secs restores it to its former state.

Can anyone throw any light on what's responsible for this behaviour? Nothing has been done to this machine recently. I replaced the right fan about 3 months ago, but it's been running without issue since. I shut the lid as normal after finishing with it last night and this morning it was comatose.

I have the same problem. I tried removing the battery - did not work. Tried the button trick while holding the power button - did not work. I am concerned mostly about my data. My kids use the mac all the time and our back up drive is rarely, if ever, connected. Is it possible to salvage the HD?

If anyone has found a fix to this problem, could you please help. This almost makes me want to back to using a PC.

I have the same issue with my early 2008 MBP. A friend recently told me it was the HD not booting properly so I installed a new (larger) one but the problem remains. The thing I have discovered that always works is to bung it in the freezer for 5 minutes! Seriously - if you are desperate try it. Don't forget and leave it in for any longer though... and do it at your own risk but it works for me and means the thing starts up and I can then just put it to sleep until the next time I need to switch it off or re-boot.