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Hi, Sorry for my english. I have 2 Macbook Pro 15 Late 2011 with the same problem. In first time, i have reball the GPU, i have check, i maked a GPU panic test with different benchmark tools. The computer works good during 3-4 weeks. And, apple release the Mac OS X 10.13.4 and i have install on the macs and computer boot, i see apple logo, bar progress and when i need to type my password, impossible to see the LCD. The backlight work When i plug external screen, i don’t see nothing When i boot on other OS under 10.13.4, work perfectly I can install a new os under 10.13.4 on other HD or SSD I have the same problem on 2 computers with the same board, do you have an idea? Possible some balls are not perfectly soldered when i replace the chipset. I have use my ZM 6200 R BGA station Thanks by advance
It seems a pretty nice Bga rework station the one you have there :) General consensus about reballing graphic chip on the A1286 is that is a short lived repair, since faults are inside the chip and quite seldom on the solder balls between chip and board. Thus you have probably done a good job on a bad chip. Here’s the opinion on the matter by someone who’s got some experience with graphic chips rework: https://www.youtube.com/watch?v=-tekqDNj… Although I don’t do rework on bigger ICs, from the number of dead boards of A1286 I’ve seen with clear signs of reball/reflow I share Mr. Rossmann view.
