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Darragh
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A1150 Black screen sometimes

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hi guys, i bought this a couple of weeks ago and it was working fie until suddenly it would boot to a black screen (not just backlight gone, completely black) so i reset pram and sreset pmu and it came back to life.

it happened again a day later, but the resets did nothing this time, still black screen.

so i googled around for a bit, and tried everything i could think of but no joy. i left it for two days and was gonna sell it for parts when i powered it on and wahey the screen came on again.

after using it for a whole day it went black all of a sudden while i was using it (first time that happened)......keep in mind that the ext display is working averytime it went black.

so it was coming on when it wanted for the next few days when i saw an article on google somewhere that said to go to some folder and delete the sleep image file and to disable hibernation (that maybe it wasnt waking from sleep properly)

as soon as i deleted it the screen came back on.

then the next day it powered on but the screen was grey wit black patches around the outside.

now its still being very tempermental and coming on whenever t suits itself

any help here would be very much appreciated, i spent a fortune on this and im broke.cant afford to take it in to be repaired.

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mayer
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Boot up from your system installation disk and see if it happens. This will help determine if the problem is software or hardware. If all works well with the DVD, then reinstall a clean system.

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Darragh
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thanks for the quick answer mayer.

ya i booted up one day, black screen again surprise surprise, so i thought it was a software issue, driver, or other. so i booted into snow leopard install disc during the install the screen came back on.

but after a few hours working on it, i shut down and it booted to black screen the next day.it was booting all the way to the desktop just the screen wasnt coming on.i t was fully functional on ext monitor.

so i took it apart yesterday, it wasnt working hen i started but when i had it completely apart inverter out and everything it worked fine.

so i pulled the tape off the screen cable and put back on the copper for the ground thing and taped it up with electrical tape and reassembled.

its been workig all day today......so ill let ya know how things go from here.

ps.after fresh install i deleted the sleep image in volumes/'my disk name'/private/var/vm and disabled hibernation from terminal.

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Darragh
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when i was reassemblig, i put a bit of kapton tape (the orange tape on the inside of laptops) over the ground part of the lcd screen....maybe the cable was shorting/touching off the top case and that was causing the problem.

ive been all day using the laptop, and have restarted a couple of times and all is well so far.

looks like i solved my own problem. well hopefully his will help someone googling around a bit with the same problem as mine.

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Jose Francisco Medeiros
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I have A1150 Mac Book Pro with a grey screen at boot up after the apple logo, even after a SMC reset, and PRAM reset, but I can boot using a safe boot, although the mouse has a small checkered box. I ran disk utility in Safe boot from another disk partition, and found no problems with bad clocks on the hard disk, or disk permissions issue's. This Computer was given to me, the Apple consultant told me that it would only boot into a black screen before, even when connected to an external monitor. I googled the black screen issue, and found a you tube video on "How to Bake My Mac". I removed the logic board, which has an embedded ATI 1600 GPU. I wrapped it in foil, exposing just the GPU chip, and placed it in the oven to re-flow the solder , after it cooled down I put the Mac Book Pro back together, and it's been working for several months with out issue, until this past week. Could this be an issue with the PRAM battery causing the grey screen, or possibly the GPU needs to be re-balled?

Since it's a 2006 Intel Core Duo, and not a Core2 Duo CPU, I am just not sure that it is worth putting another $150.00 - $300.00 buying a new logic board, or having a company remove the GPU and reball it?

Jose F. Medeiros

408-256-0649

http://www.linkedin.com/in/josemedeiros

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