Chosen Solution
Hi Recently I bought a second hand macbook air that had coffee spilled on it. The owner replaced the battery, and it was working again like a charm. Now after a few months of my ownership, I turned the macbook on, but it had no backlight. Also the macbook turned off in about 5 seconds. The weird thing is, i’ve owned this macbook for about 5 months now, and it always worked great with no problems at all. Could this still have anything to do with the spill on it? I searched alot on the internet already, and the fuse with the ‘p’ on it still seems fine, as no coffee seems to have gotten to that part of the logic board. I will try to upload some pictures of it ASAP. Thanks in advance.
Final update: I connected the new flex cable that goes from the I/O board to the logic board, and somehow it booted up with backlight and everything. So I guess the cleaning and the new cable did the job. I’m so happy that the problem is solved, and I want to thank oldturkey03 and Dan.
The ? means the machine can not locate your boot volume (SSD). Check that cable connection is in correctly and securely.