[SOLVED]820-00923 slow. Otherwise fully functional.

bjf

Member
This board had liquid damage in a few different places. After ultrasonic cleaning it turned on and appeared to be normal. The trackpad got hit and the trackpad connector on the board needed pins 44, 46, 48 and 50 resoldered. Everything works fine, but just slow. Online test gave no errors. Battery is good. I'm including pre-ultrasonic pics. Any ideas what might be causing this?
 

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larossmann

Administrator
Staff member
U5870 allows thermal sensors for the CPU, memory, and fin-stack to talk to the SMC.

U5165 generates reference voltage the SMC compares sensor values to. Important for sensors.

Both have junk on them.
 

bjf

Member
Thanks, I'll check those areas out tomorrow. And yes, the built-in test comes back clean. No Issues Found.
 

bjf

Member
larossmann You nailed it. PP3V0_G3H_AVREF_SMC was measuring about .735 to ground in diode mode. A good board is around .535. I pulled U5165 and pin 8 was charred. Cleaned it up and replaced U5165 and all is well. Thanks for the tip.
 
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