MacBook Pro 15” late 2011 not booting

formula400 wrote:

hello people, I need some help

i was editing some pictures a few days ago, Mac got a little warm, the whole screen went blue and it switched its self off, I had this happen about 6 months ago as well. At the moment it turns on, loads half the bar and then restarts. If you look closely at the bar it’s blue and purple. Like it’s using old school colours

https://discussions.apple.com/content/attachment/d9244923-c4eb-4689-bded-0c5be72d3477

I can not get it to boot in safe mode. It keeps getting half way through the progress bar and restarts, I e left it off over night and no change. I have just run the apple hardware test, it says no issues. But the writing on that screen is hard to read, almost as though the screens broken. The picture makes it clearer than it is

https://discussions.apple.com/content/attachment/c612a63d-e40f-4cbd-b12d-74c3fdd987d2

what do I do???

thanks

If your Mac doesn't start up all the way

https://support.apple.com/en-us/HT204156


If your Mac starts up to an Apple logo or progress bar

https://support.apple.com/en-us/HT207019

I would suspect a failing hard drive or a GPU issue. The 15" model is known to have GPU issues. Since you cannot boot into Safe Mode to run gfxCardStatus to force the laptop to use the Intel GPU you will need to try using the information in this article:

http://www.dosdude1.com/gpudisable/

Keep in mind performing a PRAM reset will disable this "fix".

Did you try performing the extended Apple Hardware Test?