Solved Black Screen After Capacitor Replacement Macbook Pro 15 Unibody Late 2011

Chosen Solution

Hi all. The MBP 15” Late 2011 I’m dealing with shows a black display. The Apple logo is not lit and a flashlight behind it shows no picture. Here’s the story. The machine had the usual problem and the owner already tried GPU reflowing and reballing. Finally, I replaced the failing tantalum capacitor (5 MBPs successfully repaired during last couple of weeks). This time the success is only partial. While the display looks dead, an external monitor shows everything like it should. The machine is working, it chimes, it boots, keyboard is lit. Mac Info on external monitor shows that both graphics cards are working. SMC and PRAM reset didn’t solve the issue. Disconnected and cleaned display cable, still black screen. Fuse is ok as multimeter beeps in diode mode. I already tried to de- and resolder both the capacitor and the displaced inductor: doesn’t seem to be a problem of my soldering skill. Any help is appreciated and no, I’m not sending the MBP to any genius, assistance etc. I’ll prevail, or die in the attempt :D Update (01/06/2019) Here’s the pic I was talking about

How a MacBook Pro owner that doesn’t own a highly specialized lab would have the abilities and tools to do the reballing of such a large chip as a GPU and would afterwords need another technician to replace a tantalum capacitor is beyond my understanding … Would be nice to know more. It would also be interesting to understand on which basis somebody would want to reflow/reball a faulty GPU on a 820-2915 when consensus of top reputed world labs regards this practice as a waste of time: Reballing flip chip GPUs is BULLSHIT - the truth about dead laptop GPUs & repairing themFollowup to (Reflowing dead flip chip GPUs is STILL BS!(yes, regardless of what YouTube tells you))

Lets double check things shining a flashlight into the logo still doesn’t show the faint images of the desktop, is that correct? If so then the LVDS connector on the logic board and the cable need to be inspected for damage. Not just the mating surfaces the solder joints as well.