I guess the reason you clicked this question is that you thought it was the backlight issue but it is not. This problem puzzles me.

ISSUE: My display does not work.

What MacBook do I have?

Model: MacBook Pro (15-inch, Late 2011)
CPU speed: 2.2 GHz
CPU Type: Intel Core i7 (Sandy Bridge)
CPU Model: 2675QM
Cores: 4
Bus Speed: 1333 Mhz
Turbo Boost: Up to 3.3 GHz [Never manually boosted it]
Installed RAM: 8 GB (2x4GB)
RAM Type: PC3-10600 DDR3
Hard Drive: 1TB Seagate Baracuda
Display Size: 15.4-inch
Graphics Card: AMD Radeon HD 6750M and Intel HD Graphics 3000
Card Memory: 512 MB (AMD) and 384 MB (intel, shared)

Issues in my MacBook

  • GPU Failure like most of the MacBooks from this era.
  • Speaker doesn't work as I had posted a question about this before so cannot say if the chime is coming or not.
  • The backlight is doesn't seem to be the issue cause I've tried to put light through the Apple logo.
  • I've bypassed the GPU by an NVRAM tweak but when this issue started I've mistakenly reset the NVRAM so the computer won't boot to macOS.
  • Both the fans spin.
  • The CD Drive make the usual noise.
  • Since I removed the NVRAM tweak to bypass the GPU now I can't see the apple logo to verify the backlight test so I connected few Bootable pen drives and started Internet Recovery to see the Drive icon and Spinning Globe.
  • Tried Verbose Mode to see text for testing the Backlight and as always, no a luck
  • Opened up the back and removed the display connector and reinserted it and… you guessed it not luck.

With these obstacles, I can't really tell what is making this display issue. I really hoped I could give a bounty but my reputation is quite low but still, I really lost hope in this computer and as a student, I don't think I can fix this computer ever again.

  • 4
    you need to ask one clearly articulated question, one. All you have here is a bunch of problems and symptoms. Ask your most pressing question ad we'll be happy to assist. – Steve Chambers Apr 10 '19 at 18:02
  • Thanks, @SteveChambers! As the title of the question suggests my display is not working. – Karthik Srivijay Apr 11 '19 at 3:35
  • 2
    You need to describe the exact display problem. Unclear: does the display stay dark or distorted (only the latter relates to dGPU problems[of the usual "era" kind])? Concerning the NVRAM: What happens if you just boot from SafeMode or Recovery? Please edit additional infos into the Q! – LаngLаngС Apr 11 '19 at 11:29
  • One thing you could do to improve this is to separate the issues list from the things you’ve tried list. They are both mixed together and it’s a little hard to wrap my mind around. – dwightk Apr 11 '19 at 11:56
  • Things like "Tried Verbose Mode to see text for testing the Backlight and as always, no a luck" aren't that helpful. What does "no luck" mean exactly: stays black, hangs into the boot process (but some things are visible: either the backlight alone [subtle brightness changes], the graphical logo, verbose text…) // If it doesn't stay pitch-black: how far do you get with verbose mode, RecoveryMode, or SafeMode? Describe exactly the state you arrive at. – LаngLаngС Apr 12 '19 at 13:03

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