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I checked the drop in SMC_ONOFF_L and it "drops" from 3.417 to 3.415 (which I wouldn't actually consider a "drop".) Pressing the power button does consistently cause the change (0.002V drop) when pressed, so I am guessing not a bad keyboard. There was some corrosion around resister R5710 and...

I'm looking to buy this MacBook air, It's a 2013 13"... Is this "distortion" possible without a cracked or damaged LCD? Seller said it showed up that way after liquid damage and wasn't cracked... Anyone run into this situation or it was cracked and the seller didn't realize it...

I am following the other post that is currently going on with power button issues, but if anyone thinks this could be different (it is, as Nate8organic at least powers down his Air), let me know... I figure I'll check the SMCLID measurement on mine as well, when Lid is open and also measure the...

[SOLVED]Late 2008 MacBook Aluminum Liquid damage, now working, power button not working Hi everyone! I have a Late 2008 Aluminum MacBook (I got for free) Was not turning on (green light and amber when battery hooked up) Noticed capacitor C7272 was almost completely obliterated and it goes to...

Well I guess if it is then there will be no more harm done by placing some voltage to the inductor pad... guess we'all see if something besides the CPU is the cause of the short...

Replaced Q7630, which removed the short to ground at PIN1 on Q7630. However now I plug the charger in and the fan doesn't spin anymore. If you stare at the fan, you will see it kind of barely "wiggle" constantly. It does look like there is still a short to ground on PP1V05_S0 as both sides of...

I was trying to take some diode measurements of Q7630 and looking at the package on the board, there are 4 pins on the bottom and 4 pins on top. On this "bad" board I get (from left to right) 0, 0, 0, 0.446 and then on top I get 0.450ish, 0.450ish, 0.450ish and 0 On a known good board (only...

It is for a split second, just like the spinning of the fan. It is 0V and then goes up to about 3.3v and then back to 0v, all with the cycling of the fan

I did replace the U7600 and still get the 1 second fan spin

I got home and cleaned around the u7600 IC and let it dry. I then plugged the charger in and I get a 1 second fan spin instead of No fan spin. The EN at pin3 goes from 0v to up to it seems around 3.3v and then back down to 0v, while the fan is doing its 1 second cycling off and on. What would...

Yep, I was not looking at U7600 for PIN3. I will measure that EN signal this afternoon when I get home and see if it is HIGH and if it is replace u7600 and see if it fixes my issue.

I'll check, but I believe PM_SLP_S3 (we may be talking about a different EN signal on different packages) was not missing. Having a very active 20 month old, sometimes a few days go by before I can touch a board again. Thank you for the help. I should be able to do more measuring/confirming...

Enable on pin 3 (I'm not home to confirm, but) measured 0.556V Looking at the specs of the chip, HIGH must be 1.1v or higher.

Anyone? Any suggestions would be great. Thanks!

I have a 2011 820-2936-B board which had liquid damage. Cleaned the board and I now receive green light (and amber when battery present) but no fan. The heat sink gets hot. I've tested all rails. Only ones I am missing are the PP0V75_S0_DDRVTT (Measures 0.005 V) PP1V05_S0 (0.67V) The CPU...

Well, then let me be the first to apologize by jumping to conclusions... I hope you are able to repair these machines. I have a listing on CL offering to buy liquid damaged/non-functioning Macs and 9 out of 10 emails I get are asking about selling me iCloud locked machines. So maybe I've been...

Yeah. I must have soldered it on incorrectly. Instead of trying to figure that out, I just pulled another off a board and made sure to be very deliberate with my soldering this time and no more safe mode! All seems well. Thanks again Duke!! This can be marked as fixed or solved!

Oh so, you aren't just dealing with missing/damaged EFI... You're working with stolen laptops I am guessing and wanting to remove iCloud/EFI locks... One old laptop (2009) I can see possibly needing a new EFI ROM/BIOS, but now you need an Air bios... I've only ever had to replaced one bad BIOS...

U5750 is what was originally shorted to ground. I replaced it from a "hole" board... Do you think it could be bad still? The short has been eliminated.

Okay thank you. I'll check it out in the next day or so and report back!! Thanks!