today i received a board a2681 820-02536 m2 this board stuck in 5 volt i check some volt all ok but pp3v3_aon is low, here 1.6v , when I hit the pmu it turned on, then after a while it did not turn on, then I changed pmu but same problem , someone help me what is the problem why pp3v3 is 1.6v i checked here no short
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to begin with: i'm a complete newbie.
I have a Macbook Air M2 A2681 with water damage. Cleaned with alcohol and removed one USB Connector as there was a short (1). System works, except for: keyboard is not working, haptics of trackpad are not working + right Speaker not working. The Lid Angle Sensor was corroded, but seems to work fine (put's the system to sleep, display will turn off and backlight will also go off when the screen get's closed)
I swapped keyboard, trackpad (+cable), speaker didn't change anything, so should be a board issue Questions:
1.... -
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Hi, my dear friends., Maybe this might be a stupid question or something I missed or do not know. I have 2 MacBook Air A2681 (Indentical color & EMC #), both LCD screens broken. Before ordering the LCD Screens I confirmed both worked with their respective batteries & AC Adapters, & they did 100%. The LCD Screens came in today & I replaced LCD for the 1st A2681. (Removed Battery Terminal cable for both Laptops before installation of LCDs). Perfect Screen & Booted up fine. But it did not work with battery. I checked the battery connector & it was seated in well/perfectly.... -
hello mates,, need help im a new tech here.. any tips or idea on important testpoint in repairing a no power Macbook m2 A2681? Thank you in advance.. -
Hi all,
I'm a beginner at laptop repair. I bought a MacBook Air A2681 that doesn’t turn on, just for practice. PPBUS_AON and the other always-on voltages are present and look fine. I did some diode mode measurements and got unusual readings (compared to reference values I found online) on LC320 (44mV) and L82D0 (40mV). LC320 corresponds to the PP5V_S2 power rail, and L82D0 to PP1V25_S2.
I injected 1V (current limited to 100mA, the board consumed around 86mA) into PP1V25_S2 to see if anything would heat up, but everything seemed normal. I did the same with 5V (current limited...