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Yes I removed everything. I reflowed all three chips and no luck. still fans works at maximum. Specially left hand one when look from the side of the battery.

Even after removing everything and power-up with fans and power connected. We have the same issue. Is it a good idea to reflow U5850, 5860 and 5870? Though no green colour corrosions, I can see corrosions are developing.

Connected with the battery and it turns on but still fans work at the maximum speed.

I am trying to fix a macbook Air (A-1466) and the issue is sometimes not booting at all. Sometimes boots until login screen and goes off. No history of water damage. Tried NVRAM reset. But no luck. Appreciate any support.

I am working with a 820-00850. When power up without the battery connected, keep on loading with the apple logo (progress bar filing slowly and checked for about 10 min and turned off by me since fan is working very fast). Fans are working at their maximum speed from the beginning. It takes...

I didn't try DFU revive/restore since customer needs data badly. Any way to recover data first? Don't see any lifeboat port in this model. No water damage or any other burn marks etc. Also forget to mention that CPU is very fast when turning on.

Hi, I am working with above Touch Bar macbook and when turn on, Apple logo appearing and progress bar goes for about 10-15 seconds, then screen goes off and fan works very fast. CPU is getting very hot too. Where should I check? After few seconds again apple logo appear and goes it as a cycle.

I am working with a macbook air which works with flickering. We don't have an ultrasonic cleaner and cleaned with alcohol. After drying also it flickers. What should I do?

I am working with a computer not backlight or no video. CPU is getting hot. I took following voltages without connecting the LCD assembly. PPVCC_S0_CPU: 1.8V PP3V3_S0SW_LCD - 0V SMC_LID: 3.4V PPVCC_S0_CPU 1.8V P3V3_S0SW_LCD: 0V From where can I start tracing? Up to what point we can trace...

You are right. replacing Ra and Rb solved all problems. :)

I will pull resisters and check whether they have original values.

Is bad PP3V42_G3H is the reason for SMC_PM_G2_EN changes?

Hi, the above board has following voltages. PBUS_G3H: 8.6V PPDCIN_G3H_ISOL: 16.5 pp5v_s5: 4.3V PP3V42_G3H: 5.1V PPVIN_G3H_P3V42G3H 16.2 PPVIN_G3H 16.5 SMC_PM_G2_EN. Fluctuations from 0 to 3 (moving fast and difficult to read min and max using multimeter) PPVRTC_G3H: 5.36 U7090 was...

Hi There. Please help me to fix this. Thanks.

Hi . Yes. Its voltage 14.5V

Hi There. I have MacBook A1502 2014 model,820-3476-A its not powering on and when I connect charger its R7020 getting hot .and voltage 14.5 V, Please help . Thanks.