MacBook Pro starting up to black screen
I have an early 2011 MBP 17. I do not know much of the genesis of the machine because I bought it DOA.
It appears there was a slight liquid spill (sprite?) on the machine as the red dot in the center of the keyboard was barely red and the keyboard seemed sticky. So I figure it was a light spill or massive enough to remove the red ink. There is no sign however of the suspected soda pop in the logic board. I examined it with a magnifying glass before cleaning it with 99% pure alcohol and a microfiber cloth and it had no sign of contaminants.
Anyhow I replaced the keyboard with a cheap Chinese one and the MBP worked fine except that a couple of the number keys did not work. Replaced the keyboard again with a keyboard from the same place and and the control key did not work. Both times I used the MPB for about a week and she ran fine but would not sleep with the clamshell closed. But I could tell her to sleep.
I Ordered a used genuine keyboard and this one worked.
I rebuilt the mac enough to test it and all the keys worked fine. I finished screwing in the logic board and put the cover on and when she powered up she went into a startup chime loop. I held down the power button and turned it on again and she came up in a frozen grey apple screen with the spinning wheel frozen. Turned it off again and now I get no chimes the fans run, the light on the front lights solid and just a black screen.
Tried starting without the hard drive, ram, swapping ram etc to no avail.
It has seemed that the fans on the MBP start on their own and sometimes she will boot on her own.
I have done SMC and PRAM. I noticed that sometimes before the last keyboard I could get her to boot by removing the battery, magsafe and then proceeding.
Could the logic board be fried?