Problem I had:
Macbook Pro 17" from 2008. After a Lion update I would push the power button and get a solid white light (from the sleep light), black screen and there would be no chime. I had a disc in so I would hear it spinning.
I thought it was because of the Lion update.
The Macbook must have overheated when I was doing the Lion update. I tired SMC resets, taking the RAM out, PRAM zap, etc. I heard that this could be due to the Left Logic Board.
What I did was set the Macbook up like a teepee under the covers on the bed. I put lots of pillows around and covered it good. After it got really hot to the touch, I set it in another room upside down overnight. The next day it worked! I had the HDD out, so I powered it down and put it back in.
Problem was, I decided to do updates. About a year+ worth since that's how long it was down. So there was a 2GB combined Lion update. I did the update, restarted and the issue was back: solid white light, black screen, no chime.
I set it up like a teepee again under the covers and overheat it. That did not work. So a day later I powered it on, but this time I put it upside down on the bed with the lid closed, so the batter was facing up. With it powered on, I covered it really good. After about an hour give or take, I put it in the other room to let it cool. Once it was cool to the touch I powered it on and it worked.
I thought there was a correlation with Lion, but I think it is just a heat issue. While doing updates, the computer heats up.
So far it is still working. I downloaded smcfancontrol and set the fan speed to max. I am going to order a big cooling tray for it.
But it seems it was overheating and affecting some connectors on the logic board.
So in summary, the fix (at least for me) for the black screen, no chime, solid white light: is to overheat the laptop upside down under the bed covers and then let it set until it is cool. Then give it a shot. While I overheated mine, I took out the battery and HDD. Then download smcfancontrol.
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OK - I had the same problem and tried ALL of the fixes; without success. I didn't even get the boot error sound with the RAM removed. At that point, I was sure that I was looking at a dead logic board.
Since the optical drive was spinning, I put in a system CD and tried booting holding down the 'C' key. Nothing happened. After a few more attempts, and thinking i was done for, I booted it, holding down the CD eject key; wanted my system CD back. Lo and behold, it booted! i have looked at many forums, but have never seen this solution. I have serviced many mac, over the years, including changing out drives, CD cards, screens and even a logic board in my first PowerBook G4 - so it's not like I am a dummie. For the life of me, I cannot figure out how this fix worked.
I have rebooted it three time, and all appears well. We shall see......
Thanks to all who have contributed
por Tomas Jones
Hello-a1260, will not boot, as above. (1) No startup sound
(2) Solid power light (not flashing)
(3) PRAM and SMC/PMU reset don't work
Bought another mb pro-same model a1260, replaced parts from working unit one at a time, hdd, pram battery, ram (all configurations), temp sensors, input power card,etc. Would not start until I changed the logic board. I am not savvy enough to diagnose circuit board component failures- but the board change fixed the MB Pro. Love having it back!!!!
John the Baptist
por john essigmann
Tomas Jones' simple solution worked for me! My MacBook wouldn't boot, after I returned from vacation & found it unplugged. No display, only the sleep light would come on. I held down the eject button while turning on power & it is now back up - hooray!
por Megan Leonard
Wow holding eject while starting up worked for my 2012 macbook pro! Thanks so much!
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