HELP NEEDED! Blue Screen of Death and Gray Screen

You've done EXTENSIVE troubleshooting here and pretty much covered everything that could be software related. Honestly? At this poing it has to be something hardware going on. Possibly the logic board is going out on you? If you've done an E&I on the machine (which was certainly done when you replaced the HD) and the problem still persists, then it's definitely a hardware issue. Either take it to an apple retail store, or authorized service provider to get diagnostics done to see exactly what's wrong.

Looks like a similar issue I had a while back. Download MemTest for Mac and boot into Single User Mode to run MemTest. I would guess you have a bad stick of RAM. You will likely need to reinstall the OS after the repair, if it is the RAM.

First you need to run the hardware diagnostic test from the OS bootable image.

It's definitely a hardware problem. If it's ram, don't worry, it's cheap and another

opportunity to pimp your mac further. If it's the logic board and YOU ARE SURE

that you have not physically damaged your mac, I suggest you bought an applecare.

Applecare extends your warranty and you can demand a fix or a new macbook pro.

Before you buy an apple care, though, you should read the policy to be sure. If it is

a factory defect, an apple care plan will rescue you.

I hope good luck !

Did your mac ever experienced a power loss or a battery fail ?

Download at www.memtestosx.org

Power on your MBP while holding down the Command and S keys to force Mac OS X to boot into Single User Mode. Once you see a black screen with white text, you can release the key combination. After all the system logging is done scrolling past, type 'memtest all 2' (without the quotes) to test all memory two times. Two passes should be enough to detect any blatant problems, but I wouldn’t hesitate to let it run for hours on end if I suspected an intermittent memory problem (memtest all). When complete, you should be greeted with “All tests passed” if your RAM is in good condition. If your system locks up or freezes indefinitely during the test, you may have a bad memory module on your hands.

(above taken from www.command-tab.com)

> not giving any exception

Regrettably typical.

But as long as you don't buy a Retina-type Mac you can fix them yourself, mostly, at much lower cost than Apple would charge.

Look for "take apart" or "fixit" plus your model.

"Don't mourn -- organize!"

http://www.channelregister.co.uk/2012/04/02/apple_extends_eu_warranty/

I've had three Macs I've owned _each_ fail on or within a day or two after the end of the first year, besides some failures during the first year.

Three motherboards on a 2007 Mini during the first year, for example.

I'd paid the Applecare extension fees. I think they're just part of what a Mac costs you.

Don't gamble. They break a lot.

After having had a 20 days troubleshooting experience withe same problem in the same MBP model.. and after having talked to apple too.. I am here to break a news to all those people who are having the same problem..

The problem is with the soldering of the graphics card to the Logic board.

Solution? The only Solution is a new Logic board which will ultimately undergo the same fate as the previous one And which costs around 800$

What to expect? In April, a lawsuit is going to be heard in california in which this problem will be addressed and if apple changed its mind to introduce any replacement program.. that can be a good news to many of the customers here..

Our Position? Apple has definitely lost the trust we had in them for giving us this deal at 1900$ and going through this fate and never even listening to us..

Wait for the Apple and sign the petition by googling it.. there is a petition circulating.. that may help.. btw.. a drowning man catches at a straw..