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Hello guys, I have bust noticed a strange behavior. I can normal work on MBA 1466, battery is charging and there is an orange light on the charger. However, when I shut down laptop, the orange light on the charger turns off. This does not look like normal, but MBA works normal. What could it be?

Hello to all, I have an old problem, but starting a new thread in order to present all relevant information for this particular macbook in one place. I have repaired the board 820-00165-A, by replacing U8030. The laptop worked normally for a few hours and then fan just ramp to full speed. At...

Hello macbook repair experts, maybe this is a dumb question, but on many macbook repair youtube videos, especially from Paul Daniels, I have noticed that voltage is always 18V. I can see that in addition to USB Chipmunk tester, one important indicator is current that board is drawing. But if...

Hello guys, I'm inspecting the schematics of 820-3437 board and on page "Thermal Sensors"(page 44), there are a few acronyms such as: TBT,MLB, MLBBOT, TBD, CPU Proximity, Inlet ,DDR and BMON. What are these acronyms such as TBT TBD and MLB mean? How these sensors works? All I can see on the...

Hello guys, I'm studying the schematics trying to understand what different IC chips are doing. I have found one chip particulary interesting and I must admit I cannot understand what it is doing based on the data sheet. The schematics is shown in the attached picture. The output is used to...

Hello guys, if after visual inspection traces of corrosions are detected around pins of IC chips and resistors/capacitors, is it really necessary to replace the components? I wonder if it may be sufficient to desolder components, clean placeholders /pads on the board and return the same...

Hello macbook repair specialists, I havw watched many videos from Louis Rossmann doing repairs. I have noticed that majority of laptops he repair in his videos are MacBook Airs. Now is it because Macbook pro is simply that better quality (I'm talking about 2013-2018) or simply more people buy...

Hello guys, I have a board 820-00165-A with strange behavior. When connected to the charger (board on the working bench), fan immediately starts spinning at full speed. Investigating different power rails I found out there is no PP3V3_S0 and I also found that I do have PMP_SLP_S3_BUF_L = 3.32V...

Hello guys, I have a question about different power states of the Macbook. I understand what they are and I understand that all of them up to (and including) xxx_S0 must be at correct voltages. Now, If I close the lid, the system goes to sleep and enters state S3, does it mean that all _S0...

Hello guys, I have a hot air station that is capable of supplying hot air up to 500 °C. What are the recommended temperatures of hot air when replacing IC chips on Macbook boards (for example U7701/LP8550)? Is the temperature the same when soldering BGA IC or any other component such as...

Hello guys, those who have the same logic board, can you please check if you have on your boards actual components like U8160 and Q8060 (among others)? I have received this motherboard for further troubleshooting after previous repair attempt. Now it seems that many components are missing as a...

Hello Macbook repair experts. First of all, I have virtually no experience with repiring macbooks and this is my first one with faulty logic board. I do have limited experience with repairing PC laptops. I watched many youtube videos from Louis Rossmann channel, so the concepts are clear to me...