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820-00840-a fans goes crazy after water damage

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BCN_Techs

Member
Hi,


got this board with liquid damage. After all repairs were done and it booted all was ok except that fan start to spin for 2-3 seconds with very high revolutions and than stop. Do it 4-5 times and than fan stops. Every time fan start to spin it spin max. revolucion than stop spin, stop, spin stop,.


I already checked all R4800 Q4800 zone and it all is ok.


Any idea?
 
B

BCN_Techs

Member
right, it was some corrosion under some components. Just putted it in ultrasonic for 1 more hour and now fan is ok, but trackpad sometimes stack. Checked trackpad and seems to be ok.


P.S. tried new trackpad and new flex and same. Onboard connector is ok and seems that Volts arriving also are ok. As the issue is "sometimes happenning" i cant find what exactly make trackpad fail. THe only thing i noticed is that when i close the macbook and it sleeps, after wake up about 20-30 second trackpad stuck and work, after that 30 seconds it's all ok.
 
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B

BCN_Techs

Member
Also installed HWmonitor and Airport proximity is 128C and Mainboard Proximity 128C, too Stable, all other values are movin up down, except theese two.

P.S. it's not only trackpad whole system freezes for few miliseconds than start working normal. Will try reinstalling Mojave.
 
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