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MBA A1466 Wont power on!

J

jspring

macrumors newbie
Original poster
Dec 14, 2013
5
0
Hi,

I have a MacBook Air 13" A1466 that is a friend of mine who split green tea and honey all over it leaving sticky residue over the logic board and keyboard.

I have taken apart the computer bit by bit cleaning off any residue with Isoprene and electrical contact cleaner so it looks perfectly fine now. However, the keyboard is still quite sticky and obviously I don't want to have to take the whole laptop apart to find there is nothing really wrong with the keyboard.

When I plug in the charger, it light's up green and then turns to orange (with battery in laptop). I have also tried without the battery in, incase the battery is causing the problem and the magsafe indicator just stays green.

The whole problem is that the computer will not turn on - pressing the power button on the keyboard does nothing. I saw this post (http://www.ifixit.com/Answers/View/99363...) and tried to find the solder points on my laptop to start it up but I cant seem to find any instructions for an A1466 model.

If anyone could help that would be much appreciated as I need to boot this up to see if there has been anymore damage. I have tried to see if I could boot it from a wired keyboard but the one I have doesn't have a power button on it so nothing really happened.

Thanks a bunch!
 
Hi,

I have got an A1466 Macbook Air as well that has a liquid spill. It does not have any no visibly blown components.

After cleaning it with pure isopropyl alcohol it does want to start: the power led is orange. No fan or screen action. The keyboard is not clean, so likely that will cause it not to be able to turn on.

Is there a trick to turn it on without the keyboard plugged in?
 
I suppose it´s here.

Photo_18_05_2014_13_35_25.jpg


also same location on the other side of the board.
 
Yes, I took the board out of the computer. Cleaned it with a toothbrush on both sides with plenty of pure alcohol. I have the left the keyboard/trackpad unconnected.

Unfortunately shorting the two pads you suggested does not do anything :(

Any idea as next steps?
 
most easiest would be to run down the fuses. check each one for continuity.
if all good, the look for schematic. and start digging. could be anything. also -- I would suggest to dry the board with a hairdryer or something, as alcohol may still be under BGAs.

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yeah. -- disconnect everything. leave the bare basics. -- mag board and main board. (shorted keyboard may ***** with the system, sometimes)

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do you have a multimeter ? measure voltage on pads I showed. one should be 3.x

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A1466 Schematic HERE!!

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power on is also pin-11 on trackpad connector (mobo side). short it to ground to power on. (or test continuity from p11 on trackpad to pads I showed -- one of them should beep.) if so -- then they are power on pads.
 
hi thanks for for your speedy replies! Unfortunately I do not have any tools here. I am visiting friends abroad that happend to have had a spill. Also, everything after measuring with a multimeter is beyond my hands on experience unless it is just swapping a part.

So looks like a job for a real pro. anybody recommendations for repair shop in Vancouver?
 
I´m from Iceland! :) so you´ll have to wait for someone else. :))

like I said -- give the board a good dry. may be some alcohol doing something.

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try SMC bypass after you dry.
 
Bringing it to Iceland might be a bit too much :) Could you explain how does the smc bypass go without working keyboard? (I thought that was done by holding the power button..)
 
yes, power button!! (or pads I showed You before) :D

from another topic::::
Temporary bypass:
With the magsafe disconnected press and hold the power button. While continuing to hold the power button plug in the magsafe connector. Continue to hold down the power button for 5 to 10 seconds. Release the power button and wait a couple of seconds. Now press and release power button. PRESTO! The Macbook chimes and starts up but with fan on high speed. Boots up into OSX but with a few caveats which I list below:

OR google ---> mac smc bypass

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power button on air's is embedded in keyboard, but not directly connected to keyboard.. dunno how to explain. --- basically = pwr button does not go through the whole keyboard thing, but has seperate pin on the connector. (pin 11) -- so holding button on keyboard would be the same as shorting pads on mobo.
 
MBA A1466 cannot turn on and then on by itself

I bought this MBA for less than a month; was working fine in the morning and when I returned in the afternoon, the screen was black and dead.

No matter what i did, it did not wake up. Tried the methods advised on the internet, did a SMC, called Apple Care to troubleshoot and nothing works.

And then after 5 hours, I pressed on the power button and then it woke up again.

I was happy but am afraid that this will happen again?

Is Apple getting unreliable and unstable?

I hope not... seriously.
 
SMC_RESET_L U5110 show 0.65v , this ic pin 8 should 3.3v its come from smc pin 41 PP3V3_S5_AVREF_SMC but this pin voltage 0.20v something , that means SMC PROBLEM? PP3V42_GH AND PPV1V2_S5_SMC_VDDC OK
 
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