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Hi Aprendiz, Sorry for responding so late. Here are the voltages that you had asked me to check on J4800 Pin 10 - 3.35 V Pin 14 - 5.16 V Pin 19 - 3.42V

Hi Duke, Aprendiz and members of the forum. Continuing with this topic, I changed the cable as was advised by aprendiz. Now a different issues has come up. The trackpad and the keyboard does not respond. I connected an external keyboard and a mouse to the Macbook Air and when I go to System...

One of the cable has a little corrosion. Let me try changing the cable. If that does not help, I will have to contact back. I will have to order a new cable, so I feedback will only be next week. Thanks. Raj.

Hi Duke / Louis, Can this post be closed / Solved, as this logic board was repaired by you. Thanks and Regards,

Hi Duke / Louis, I received a Macbook Air which was not turning ON. Customer complained that her daughter spilled very little liquid on it. I opened the computer and also watched a video by Louis that how a trackpad can make a Macbook Air not turn on. I followed the instructions and saw that...

Hi Duke, As per your advice I checked all the resistors in the data lines and none of them are short to ground. Where else should I look for troubleshooting. I even tried to watch some of the videos of Louis in relation to 82-3437, but still am unable to solve the motherboard and make it turn...

Hi Duke / Louis, I Ultrasonic the motherboard, the components are all clean and shiny, but still the fan does not spin. When I connect the logic power to the magsafe adapter, the light stays orange, but the fan does not come on. I checked the following rails and here are my findings. PPBUS_G3H...

Ok, Thanks Duke. But troubleshooting wise you don't see anything wrong ? I was watching one of the videos of Louis where he has mentioned that PP5V_S0 is not present and then the computer will not come on. I checked the voltage on U8180 and it shows 0 ( Zero Volts ) Do you think I am going...

I have Crest CP500D and I use Branson EC with Distilled water.

Ok let me try giving a ultrasonic clean. Will get back to you. Around how much time should i put it into the cleaner and at what temperature. Please advice. Raj.

Hi Duke, I looked over the complete board, but I don't see any corrosion. The only green corrosion is see is by the SD Card reader. Some of the probe points I see are dark red, few are green and most are yellowish. Would a ultrasonic clean help ?

Hi Duke, The voltage on L7560 = 3.33V The voltage on L7520 = 0 V I don't see any corrosion around U6100 and neither on U1950. Is L7520 supposed to be 0V ? Because from the schematics I see it, should have 5V. Please advice.

Yes it was liquid damaged and the customer changed the keyboard and trackpad himself, after which it worked for almost 9 months and then it shut down on him.

voltage on PPBUS 8.60V.

Hi Jadao, Yes you were correct. My sincere apologies, I was not setting my range correctly. Instead of setting it to 00.00, I was setting it to 0.000 due to which any component that I was measuring I was getting .OL. Ok so now PPBUS_G3H is present and PP3V42_G3H is also present. Further...

Hi Duke and Rossmanngroup team, Let me start this again. Please be patient with me. Here is what I am doing and now you please advice me what is that I am doing wrong. I am trying to put everything in step form. 1. Connect logic board to power. 2. Measure voltage on PP3V42_G3H - All are...

Hi Duke, Forget the multimeter, Basically what am I supposed to check when the meter in Ohms. Let me get this straightened and then I can probably get you a better answer. I see that the multimeter shows 3.42 volts on PP3V42_G3H. If I have to check PPBUS, under Volt DC mode, what voltage...

Hi Duke, As advised by not connecting the power and measuring the resistance to ground on PPBUS the multimeter does not show any change. When multimeter is turned on into Ohms, it stays at OL and on measuring the components, R7006, R5501, Pin 4 of Q5500, Pin 2 of R5450 and R5430 there is no...

Hi Duke, could you please explain me how to measure resistance to GND for PPBUS. Sorry, this may be the most basic question that I may be asking, but I am being honest that I don't know how to measure resistance to GND. Regards. RAJ.

Hi Duke, when I put my black probe to ground and the red probe to one of the capacitor where PPBUS_G3H should be present the multimeter shows OL. Actually that was my question initially. What is that I am missing to check. Also your question regarding charger light, yes the light is showing...