MagSafe charging light not coming on.
I'm sure everyone is tired of answering liquid damage questions, but here goes. A friend spilled soda onto her MacBook, which suffered as a result. I have taken the machine apart and cleaned it up. However, the machine was given to me quite a while after the spill. Surprisingly, other that a few sticky spots, there seemed to be little observable damage. Before the spill, the machine operated normally as far as charging, battery usage, etc.
The symptoms are commonly described on the iFixit web site. In my case, the charging light on the MagSafe adapter does not come on and the battery does not charge. Plugging in the adapter will start up the fan (sometimes with what appears to be excessive RPMs) and the machine will boot up (though not every time - looks like maybe something needs to be completely discharged first). I can log in and use the machine normally at this point. However, sometimes after it goes to sleep it won't wake up - not right away at least.
Corrective actions so far:
- Cleaned up the logic board
- Replaced the IO board with another one
- Reset the SMC using the prescribed keystrokes (when I do this the machine goes off immediately and I can't usually start it right away)
- Tried another adapter, with the same results
Most of what I have read about this issue pointed to the IO board, which is why I replaced it. However, the replacement board was not new so there is no guarantee that it works either. Other research indicates that there might me a fault in the One-wire charging circuit. But here we leave my comfort zone when it comes to home repairs - tracking down and fixing component-level issues is not going to happen.
Any thoughts on how I should proceed? Seems like this is not an SMC issue - is that a safe assumption? Anything else I can try at home?
Is this a good question?