820-3437 loud FAN - Liquid spill

[badcaps]

I have 820-3437 with liquid spill corrosion around the SMC , I/O cable need replacement , corrosion around U7600 , U5800 etc ... I cleaned the impacted area. This has few Proximity sensor and all look clean. Q5810, Q5830, Q5860 ,

The board is completly removed from the laptop and only the FAN , heat sink and the I/O board is connected. When I plug the adapter there is no light and the fan start spinning loud.

Any clue what can cause this ? I am going to order New I/O board but I am not sure if this will solve the loud fan issue.

[piernov]

Re: 820-3437 loud FAN - Liquid spill

No light: DC-in board itself, its cable or the connector on the motherboard (may have damaged pins or pins that became unsoldered) most likely. If that doesn't solve it it could be related to the SMC.

High speed fan: you have to plug back the board into the assembly and connect everything. (well… at least the touchpad)