black screen no boot
My macbook pro c2d not booting . I remove the ram and switched on processor,harddrive & optical drive is in operation. front light is steady.
please provide a solution
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Remember to test the RAM slots by powering on with one slot empty, and then the other empty.
We don't have ANY info on this guy's machine, so it's definitely jumping the gun to assume a video chip defect.
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He did the RAM test, no joy.
How do you know that? That he did it correctly can't be determined conclusively from his statement "I remove the RAM". He might have removed both.
it doesn't really matter if he has removed both ram modules though, because you would get the 3 beeps to indicate no ram is fitted, which is more of a response than he is getting now. You can always go the extra step and disconnect everything that is non-essential to its booting needs to ensure nothing is shorting out, but because of how common the graphics fault is, and the symptoms he is having are exactly what you would normally see in a worse case scenario in those generations... It wasn't said that the graphics fault is definitely the cause of it, but it is a very probable cause, making it very likely.
Seriously, we don't even know if this is a 15" Aluminum Pro or a Unibody Pro! I've seen many boards with damage behave like this with both RAM modules removed. Also, machines with a bad slot behave like this when the slot is populated, so removing the module from the bad slot would reveal the problem if this were the case, which makes testing the slots individually relevant. Yes, a GPU issue is likely, but my point is, we have no information on this computer, and effective troubleshooting requires having the proper information before coming to conclusions. Shooting from the hip is a disservice to the user and runs the risk of wasting time/money and sending the person in the wrong direction.
Theres no point in going back and forth about it rdklinc, because you've obviously not read my last comment properly... Because the specific range wasn't mentioned, i simply pointed out a very common problem with a range that it could be. i stated that the fault was most common with the SR and 08 ranges, but only he knows what model he has to make any judgement from there. I wasn't trying to give a diagnosis of the fault, just stating a common fault. end of.
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I'm guessing you have the 07/SR model or the 08 Penryn model, correct? If so, there is a very common NVIDIA graphics fault with those ranges that usually show up with the faults you are seeing. are you able to reset the PRAM, do you get an audible chime at all?
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FYI - Apple just put these systems on their EOF listing. So they won't fix them any more (which was the cheapest way) when you had the NVIDA GPU failure.
Not many service options left here, while some folks have done the re-bake it doesn't last and has its own risks.
De-soldering the GPU, cleaning it and re-soldering (re-balling) with a better solder is the best route. Alas, most people don't have the correct equipment or skills to do this (thats assuming the GPU is still working and is the better rev chip).
Getting a new logic board is the best route for most (expensive) and you need to be sure you have the -2 rev of the board (so you get the better GPU).
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