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
-
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... -
today I received MacBook Air A2681 M2 for repair. The MacBook is working have a startup sound and charging sound but no video on the screen I checked the backlight voltage which is 0V then I checked the backlight ic enable there is 0V on anyone please help me.
-
Hi,
water damaged MacBook a2681 M2 draws 5v 0,4A, u7700 gets hot, so I guess it must be bad.. Now I wonder, where could I get that chip? there is nothing on aliexpress... is it only good from same doner board?
Thanks for help!