Came in with small liquid damage on U3200 and U8210.
Cleaned up U8210 and verified it's outputs.
Flowed some flux under U3200 and ultrasonic.
Machine turns on with power button or by plugging in USB-C and fans spin, but screen remains off.
After about 30 seconds screen comes on and ? folder blinks with customers SSD installed.
Tried 3 known good USB installers. All of them will give Apple logo, but then locks up forever and never boots.
Also no WiFi networks show up when attempting internet recovery/diagnostic mode.
The entire board looks flawless except for the U3200 area.
Both USB ports will work to turn the machine on and charge, so U3200 is at least partially working...
How likely is it that corrosion under U3200 is causing all of this? I have another on on order but it will be a while before it arrives...
Cleaned up U8210 and verified it's outputs.
Flowed some flux under U3200 and ultrasonic.
Machine turns on with power button or by plugging in USB-C and fans spin, but screen remains off.
After about 30 seconds screen comes on and ? folder blinks with customers SSD installed.
Tried 3 known good USB installers. All of them will give Apple logo, but then locks up forever and never boots.
Also no WiFi networks show up when attempting internet recovery/diagnostic mode.
The entire board looks flawless except for the U3200 area.
Both USB ports will work to turn the machine on and charge, so U3200 is at least partially working...
How likely is it that corrosion under U3200 is causing all of this? I have another on on order but it will be a while before it arrives...
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