cMBP 2012 15" No display

[Beachguy]

I've been fighting to get my MBP back up and running again. Good news is I have a temporary drive in it and it seems happy. EXCEPT... The display in the clamshell (which I will be replacing anyway) is not coming on- I have to use an external display. It doesn't even seem to be acknowledge by macOS (10.12.2 beta) so I can't even try to force it.

I thought perhaps the display had died, but when I was trying to reinstall OS X initially (10.7.6) it came on once, but when I had to reboot, it disappeared again. It works fine with an external display.

I've reset the SMC and the PRAM but it didn't matter.

I am thinking some wiring, perhaps, has become loose or broken? Any ideas?

 

[keysofanxiety]

If you download gfxCardStatus and force iGPU/dGPU, does that affect whether or not the internal display comes on or not? May be worth trying a combination of the two with PRAM resets throughout: Download gfxCardStatus v2.3

 

[Beachguy]

It didn't seem to enjoy the experience:

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000; background-color: #ffffff} span.s1 {font-variant-ligatures: no-common-ligatures} span.Apple-tab-span {white-spacere}

/Applications/gfxCardStatus.app/Contents/MacOS/gfxCardStatus ; exit;

dyld: Library not loaded: @executable_path/../Frameworks/ReactiveCocoa.framework/ReactiveCocoa

Referenced from: /Applications/gfxCardStatus.app/Contents/MacOS/gfxCardStatus

Reason: no suitable image found. Did find:

/Applications/gfxCardStatus.app/Contents/MacOS/../Frameworks/ReactiveCocoa.framework/ReactiveCocoa: file too short

/Applications/gfxCardStatus.app/Contents/MacOS/../Frameworks/ReactiveCocoa.framework/ReactiveCocoa: file too short

Abort trap: 6

logout

Saving session...

...copying shared history...

...saving history...truncating history files...

...completed.

Deleting expired sessions...none found.

-----------------
This has happened on a couple of unrelated apps today. I suspect I have found a bug in macOS in this beta.
[doublepost=1480374689][/doublepost]That said, the "About this Mac" windows shows it as being the NVidia 650m.
[doublepost=1480375029][/doublepost]...aaaaaaaand...


NVIDIA GeForce GT 650M:



Chipset Model: NVIDIA GeForce GT 650M

Type: GPU

Bus: PCIe

PCIe Lane Width: x8

VRAM (Total): 1024 MB

Vendor: NVIDIA (0x10de)

Device ID: 0x0fd5

Revision ID: 0x00a2

ROM Revision: 3682

Automatic Graphics Switching: Supported

gMux Version: 1.9.23

Metal: Supported

Displays:

Acer X223W:

Resolution: 1680 x 1050 @ 60 Hz

Pixel Depth: 32-Bit Color (ARGB8888)

Display Serial Number: LDX0D0118512

Main Display: Yes

Mirror: Off

Online: Yes

Rotation: Supported

Automatically Adjust Brightness: No

...versus (in the "About this Mac" displays tab)...



Intel HD Graphics 4000:



Chipset Model: Intel HD Graphics 4000

Type: GPU

Bus: Built-In

VRAM (Dynamic, Max): 1536 MB

Vendor: Intel (0x8086)

Device ID: 0x0166

Revision ID: 0x0009

Automatic Graphics Switching: Supported

gMux Version: 1.9.23

Metal: Supported

 

[Beachguy]

Still no progress. I'm getting the feeling there is a broken wire, perhaps?

 

[duervo]

I've been fighting to get my MBP back up and running again. Good news is I have a temporary drive in it and it seems happy. EXCEPT... The display in the clamshell (which I will be replacing anyway) is not coming on- I have to use an external display. It doesn't even seem to be acknowledge by macOS (10.12.2 beta) so I can't even try to force it.

I thought perhaps the display had died, but when I was trying to reinstall OS X initially (10.7.6) it came on once, but when I had to reboot, it disappeared again. It works fine with an external display.

I've reset the SMC and the PRAM but it didn't matter.

I am thinking some wiring, perhaps, has become loose or broken? Any ideas?

If it is the display cable, I believe that's not something that can be easily replaced on its own, as it's soldered onto the display. Bad cable = replacing the whole display, which isn't a big deal in this case as it appears to be something that you were planning to do anyway.

 

[Beachguy]

Yes, it is a necessity. Apparently, even more so now. The glass is cracked a lot from a vandal as it is. I'm using it as a desktop for now.

 

[DeltaMac]

I was just going to suggest having your MBPro checked at an Apple store to see if you come under this repair program
http://www.apple.com/support/macbookpro-videoissues/

But, if the display glass is cracked, seems that might be more the issue than an equipment failure.
HOWEVER - it wouldn't hurt to ask. The Apple tech would run a simple diagnostic test on the display card.

 

[Beachguy]

The system is just fine electrically. The display just crapped out suddenly.

I'll worry more once it is replaced, but even with the messy glass, it was usable.