Possible SMC damage from liquid spill - needs a logic board?
My neighbor asked me to see what I could do with a MacBook Air, model A1369 EMC 2392. I believe it was purchased in late 2010 or early 2011. It has had water spilled on the keyboard. They dried it out but it did not seem to want to boot up. I took it apart, disconnected most of the cables, and reconnected them to hopefully refresh those connections.
After working with it for a while I decided to try pointing a flashlight at the screen, and I determined that it had no backlight. Apparently this model has an LED backlight. I can use the system if I connect to an external monitor. However, it seems to want to go to sleep almost immediately as if the screen was in the closed position. I can keep it going by constantly moving my finger on the touchpad.
After reading lots of good information on this web site, I have reset the System Management Controller (SMC) and the PRAM. The resets seemed to take okay but the symptoms have not improved.
I am now thinking that the SMC circuits could have been damaged by the liquid spill. This is the first time I have ever cracked open any type of Mac so my experience is very limited and any advice is welcome. If the SMC is damaged, I have no idea if it could be replaced or if the entire logic board would have to be swapped out. Does this system need a logic board?
Edit on 7/7/13: I have attempted to add a shot of the system with the back cover removed. I will take closeups of the connectors that could be problems.
Okay, it took me a while to get even halfway decent closeups after some business travel. I have never done much macro photography and certainly never tried to shoot anything like a circuit board. I have marked one of the most corroded areas in this shot.
Here are a couple more closeups. Can anyone mark the connector is for the cover sensor?
Can you give us the last three digits of the systems serial number so we can identify which model you have.
由 Dan 完成的
Often when liquids are spilled they can leave traces which can sort or corrode things. When you opened the system do you see any spots where the spill was? Also, what exactly was spilled as that can help in what will be needed to clean things up. Yes, something could be damaged and may need replacing but until you locate the areas effected by the spillage it will be tough to isolate what needs replacing with so little to go on. If you can take some pictures the more detailed the better. Took soon to tell if the logic board needs replacing.
由 Dan 完成的
dlsnook, does this look like your computer specs: 1.86 GHz Core 2 Duo (SL9400)
Intro Date: October 20, 2010 Disc Date: July 20, 2011
Order No: MC503LL/A* Model No: A1369 (EMC 2392)
Subfamily: Late 2010 Model ID: MacBookAir3,2
Std RAM: 2 GB Std VRAM: 256 MB
Std Storage: 128 GB, 256 GB Std Optical: None*
由 oldturkey03 完成的
oldturkey03, thank you for looking up the specs. It looks like you are on the right track. I have misplaced my "Mini DisplayPort to HDMI" adapter. I will boot the system and confirm the specifications after I find that device. It is pretty much impossible to run the computer without going to an external monitor since the backlight is not working.
由 dlsnook 完成的
dlsnook, you are welcome. I hope we can help you further once we see what you are up against.
由 oldturkey03 完成的