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Hi Duke, Yes PP3V42 is present. But when i measure the resistor and capacitors on the PP5V_S0 I am not getting 5V on PP5V_S0. Am I going in the right direction, Also on PP5V_S5 when I measure the resistor and capacitors (C7400) and Pin 12 on U7400 the multimeter shows up .OL. I believe that the...

Hi Smiba, My multimeter is an Auto Ranging Multimeter which ranges up to 600V 400mA MAX. I am not getting PPBUS_G3H as 12.6V, when I put the multimeter in VDC mode and measure the component where PPBUS_G3H is present, I get OL and not 12.6V. I would highly appreciate if anyone can point out...

I replied your question as aprendiz. Louis is online and he asked me some questions, which I responded as mentioning Hi Louis. Anyways. Now answer to your question. I am measuring the above by putting in VDC mode. Is that resistance mode ? Raj.

aprendiz. The voltage on PPBUS_G3H is showing .OL. I have my charger plugged in and it is giving me an orange light. The battery is not connected to the Logic Board.

Louis, Ok here is what I am doing. I plugged in the charger and I go on the schematic page to see all the power rails. The first power rail I see is PPBUS_G3H. I go to the board view by Landrex and under "Net" put in PPBUS_G3H, where the board view software point out all the components that...

Hi Guys, Today I received a Macbook Air 13" which is not coming on. I checked the power rails and found out that the PPBUS_G3H is showing .OL on the multimeter. Now here is what I did. I measured every component where PPBUS_G3H should be present, and it measured as .OL. I understand that .OL...

Louis, thanks for your feedback. Tomorrow I shall positively go through even step provided and get you the conclusion of what I think. Even if I am wrong I will comment because I know I have the masters to correct me if I am wrong. Thanks a million once again Louis, Duke and the whole...

Louis, please help. Now the green light also went off. I watch your videos but feel scared to comment. I don't know why.

Duke, can you please help. Regards, Raj.

Hi Louis / aprendiz, I check the voltage on Pin 13 and I get 3.44 V. And honestly I did not understand the 2nd question of aprendiz about Resistance to ground on PPRTC_G3H. Louis I looked at the U2800 and the PPVRTC_G3H rails and I am unable to come at a conclusion yet as to what could be...

Hi Duke, I am getting 0.42V at all the 3 caps - C2231/32/33. Also i went ahead and checked the U2800 where the Pin 1 which is VDD_RTC_OUT is showing me 0.42V. Is this correct. Please advice further.

R1800 Pin 1 and Pin 2 - 0.42 R1801 Pin 1 - 0.42V Pin 2 - 0.38V R1802 Pin 1 and Pin 2 - 0.42V R1803 Pin 1 and Pin 2 - 0.42V

Duke, can you please advice further.

Hi Duke, I checked the voltages and all R1800/1/2/3 and they measure 0.42 V except R1801 which measures 0.38 on Pin 2 .

Duke, please help me out. Please try to get me the possibilities to make this board working again. I am trying to learn, though I am slow, but your help would make me confident in fixing boards. Regards,

PPBUS_G3H is all showing 12.56 V

Well the charger light came on again. but the fan still does not spin.

Hi Duke, I don't know if what I did was correct. I put some flux on the U7200 and heat the chip in little bit. After that now the green light on the charger does not want to come on. Please advice what is wrong that I am doing so that I can fix it and make this board working. Louis, please...

Hi Duke, As i mentioned in my chat an 1 hour ago, that when i touch the red probe to one of the pins either 5 or 6 ( not sure ) the fan spins. This is what i did - I connected the logic board back into the computer connected all the cables including the LCD connector. and then went ahead and...

Hi Duke, I was trying to measure voltage on every PIN on U7200 chip and while measuring from Pin 1 and progressing forward, I observed that when I measure Pin 5 by keeping the Black probe to ground and Red probe to Pin 5 the FAN STARTS TO SPIN. If i remove the probe the Fan stops. What does...