MacBook Air tried all resets still won't turn on

[paulrbeers]

There may be a fault in the power connection/logic board where the circuit traces that join the individual components break developing hairline fractures. Temperature changes cause expansion or contraction making the fracture act as an "off/on" switch. Also the surface mounted components may have a fractured connection.

Dude, this thread is almost 2 years old.....

 

[MacModMachine]

There may be a fault in the power connection/logic board where the circuit traces that join the individual components break developing hairline fractures. Temperature changes cause expansion or contraction making the fracture act as an "off/on" switch. Also the surface mounted components may have a fractured connection.

lol @ explanation , even more lol @ 2 year old thread.

 

[stibbe]

Same problem

x

 

[abhinaysoni]

I can't get ny mac air on it was working perfect last night , shut it down turned it off and then I tried to turn it on the next day it wouldnt work?
I've tried the pram reset and the smc reset still nothing?
I've left the mac fully charge still nothing?

My air is the a1370 11"
Any suggestions.?

hey.. did your macbook is still working or you have facing the same problem..

 

[EastCanMechMan]

Macbook Air tried all resets still won't turn on.

There may be a fault in the power connection/logic board where the circuit traces that join the individual components break developing hairline fractures. Temperature changes cause expansion or contraction making the fracture act as an "off/on" switch. Also the surface mounted components may have a fractured connection.

[doublepost=1480088242][/doublepost]
Oops...
Ok. This is the answer for you & most others!
You changed the keyboard but neglected to change the track pad which is more likely where water caused problems.
If you know which pads are to start computer without keyboard ribbon attached... do this to see if Mac starts but make sure no corrosion is inside keyboard ribbon connector & especially LVDS cinnector( read below on this too) (don't short anything else so be very cautious.) Another way is to leave keyboard ribbon connector but flipped up, hold power button to start and wiggle the ribbon a little bit to angle it differently in its connector in logic board - if computer starts leave it disconnected!
The connector, as well as the flip thingy are super fragile.
Also check the ribbon for signs of corrosion where it fried or bent the gold strips when you inserted it improperly.
This is step one only but is logical choice for water issues.
Of course it would be good to inspect logic board completely (both sides)for water and minerals deposits on components which still cause shorts & use 90% alcohol and Drexel with plastic brush or toothbrush - sometimes a needle to remove gunk in between components.
If serious corrosion - you may have faulty components - touch logic board with fingers when on (if fan spins) and seek extremely hot components - this would be the issue - or something in proximity.
These are complex devices but in that complexity there are ways to figure it out.
Power rails for example.
Buy the Back board & .PDF for 7.00 eBay & the likes.
Check out Louis Rossman or other Videos on YouTube about testing circuits and logic boards there are names in the circuits he is looking at, where he bought the .PDF files.
Hope this offers a place to start.
Hard to give this info out when I buy damaged MacBook and it's profitable at times for simple fixes like this so I will probably lose deals in the future because I post this on-line but well maybe some Joe needs a bit of help like I did years ago and still do today...
Even though this post is old it's still applicable to most MacBook water damaged issues & that have keyboard attached to the track pad and other track pad types & track pad ribbon Connector ssues.
Most important is to check the LVDS cable and connector for corrosion prior to powering up a water damaged board, between it's connections in logic board and inside the connector itself (I use the striker stuff from a pack of matches as sandpaper to clean inside connectors carefully - these connectors are super fragile. Flip the metal clip and gently pull it out while holding down on the ends of the connector on logic board so you don't Rip it off the board.
Inspect this carefully & the ribbons & all other connectors.
You don't need a microscope - just a very bright light, patience & a few tools.
Good luck!
East Coast Canada Rocks!!!
Let me know if this helps!
Give us feedback when we help solve your issues.
Thanks Peeps.
[doublepost=1480088578][/doublepost]

hey.. did your macbook is still working or you have facing the same problem..

Try disconnecting battery and starting it...then read my post below but that could be power supply issue, a ribbon or other connector or worse issue but not enough info. Do you have fan spin it any sign of light on charger?( Check k it in a dark room to see if is a faint light indicating a short - perhaps in a connector or a connection. If it overheated and No chime or video it could be a thermistor on or near GPU/CPU.
[doublepost=1480088960][/doublepost]If your MacBook is running hot or was take it apart and clean the cooling system and add new silver paste but don't use too much.

Abhinav, are you asking me the question?
[doublepost=1480089160][/doublepost]Oops. If it was running hot or you left it in the bed running and it shut down then it overheated and a thermistor is gone. This can be soldered over and will start Mac but at full fan spin! AnOther condition of full fan spin is No thermal paste on CPU/GPU. or no Heatsink on same.

 

[EastCanMechMan]

His macbook will never start with a water damaged track pad or ribbon, or connector, or a faulty keyboard from water!
Read my post below to test that or resolve.
Disconnect the track pad!

 

[Ugatreydawg]

Iam having this same problem I have gone as far as buying a new power cord. And changing the power supply. Still the same thing it'll turn on once in awhile but completely random. I have even taking out the internal battery to make sure that wasnt the problem and still will only power up randomly. If anyone has any suggestions what this could be please let me know. I am pretty computer savvy but this 1 has me stumped. I am also too thinking it could be the keyboards power button . Is there anyway to test this to be sure does anyone know of ? Thanks

[doublepost=1509423008][/doublepost]I too had this issue and found the answer. If your MacBook falls in this time segment they will fix it at no cost. It is apparently a recall. Best news I had gotten in the midst of trying to fix it.

 

[shaamit]

The problem with these types of threads is that there isn't enough information to even make an educated guess at the problem, let alone deduce which one of many possibilities actually ails your Mac.

Why does it matter that your Mac is out of warranty? Apple geniuses will usually take a look and run tests for free, and sometimes will even take it in for a tech to work on free of charge. Certainly, if it does cost money to fix (ie fried logic board), you can always decline and find someone else to do it. There's no reason not to take it to Apple to ask them to check it out. It's certainly better than asking us -- without access to the computer and the vaguest of symptoms (no boot), it's impossible for us to tell you what's wrong.

----------



Wait, so the OP damaged it? @OP, see, here's the other problem with threads like this. Did it develop symptoms/other problems earlier, or did it actually just die as described? We definitely can't help you if the actual issues aren't even as described.

If there is a liquid spill and the DC-in/battery is working normally, then it could just be the keyboard itself, as it wouldn't be able to recognize the power button or any key combination to reset PRAM, etc. This is a perfect example of what I described in the above post -- being holistic, accurate, and honest is the most useful thing when you need help. If I didn't know about the liquid spill, I'd say 100% chance you needed a logic board replacement.

EDIT: I didn't realize this was your other thread -- https://forums.macrumors.com/threads/1529101/... so the intrigue continues, as do the inconsistencies. Does the charger turn green or not? Is your battery working? Are you just trolling us?

[doublepost=1521494171][/doublepost]

The problem with these types of threads is that there isn't enough information to even make an educated guess at the problem, let alone deduce which one of many possibilities actually ails your Mac.

Why does it matter that your Mac is out of warranty? Apple geniuses will usually take a look and run tests for free, and sometimes will even take it in for a tech to work on free of charge. Certainly, if it does cost money to fix (ie fried logic board), you can always decline and find someone else to do it. There's no reason not to take it to Apple to ask them to check it out. It's certainly better than asking us -- without access to the computer and the vaguest of symptoms (no boot), it's impossible for us to tell you what's wrong.

----------



Wait, so the OP damaged it? @OP, see, here's the other problem with threads like this. Did it develop symptoms/other problems earlier, or did it actually just die as described? We definitely can't help you if the actual issues aren't even as described.

If there is a liquid spill and the DC-in/battery is working normally, then it could just be the keyboard itself, as it wouldn't be able to recognize the power button or any key combination to reset PRAM, etc. This is a perfect example of what I described in the above post -- being holistic, accurate, and honest is the most useful thing when you need help. If I didn't know about the liquid spill, I'd say 100% chance you needed a logic board replacement.

EDIT: I didn't realize this was your other thread -- https://forums.macrumors.com/threads/1529101/... so the intrigue continues, as do the inconsistencies. Does the charger turn green or not? Is your battery working? Are you just trolling us?

.......well they used to be a lot more helpful years ago, but these days are significantly couldn't care less. In the London Covent Garden GB, they refused to look at my laptop, not even test or give advice. Just because it was 2011 and therefore too old. Wiped their hands clean off of it. I even offered to pay for any tests. Turned their back and couldn't wait to serve the next guy. It if hadn't had another 5 newer machines at home and work I'd give up on Macs. Far too expensive, purposely design older models out or slow them down with bloatware, forever redesigning cable connections and power supplies with no adapters, and thats how they make their multi billions - oh and by not paying tax at the rate my business does. They used to care but have found out they don't have to any mire. IBM Mark II........