820-3332 - Shuts down after going into sleep mode and won't power up

[macRepairAmb]

I have a 820-3332 that once it goes into sleep, with the MagSafe charge not plugged in, it will refuse to come back on until i perform SMC reset. During the period that it won't power on, i plugged in the MagSafe and the light on the MagSafe would some times never lights up until the SMC reset. Other times it lights up orange, never goes through the initial green then orange until i do the smc reset. Can't seem to create the same fail with MagSafe connected when the computer is put into sleep mode. I've replaced the battery with the same result.

Could this be SMC related?

Any suggestions

 

[JohnB8812]

Resoldered U8900?

 

[2informaticos]

Resolder U8900, as previous step.
If no change, then monitor SMC_RESET_L and SMC_LID signals, when it gets stuck.

 

[macRepairAmb]

sorry for the late response. I desoldered U8900 with no luck. So, i started performing the test when i found corrosion on C4915, R2585, R2502 and Q5059. Some how i missed this during my initial scan of the board. Anyway, replaced all of them and the laptop is now fixed.

Thanks guys again for all the assist

 

[2informaticos]

Probably accumulated crap underneath SMC was burnt when you've changed the components close to it.
None of them seems to be involved in the related issue...

 

[macRepairAmb]

yeah probably.