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オリジナル投稿者: rdklinc ,

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I'd test the RAM slots.  Take both modules out, and see if you get a light on the AC.  Then put one in, leaving the other slot empty, see if you get a light, then remove the RAM and put a module in the other slot, leaving the first slot empty, and see if you get a light.  Switch the RAM with the power off, of course.

I would do all testing with the battery removed.  Having it attached will only complicate the situation.

If you look at the AC adapter connector, do you see a dim light?  Cup your hand over the connector and look at it closely to see if there's a dim light.  If so, that's usually a power issue related to the board.  Despite popular opinion, MacBook DC-ins very rarely go bad, and it's usually the board itself.  That said, it's only a $30 part on eBay, so it's worth trying another before giving up.

I would also remove the board and examine it for corrosion from liquid damage.  If you find any, you can clean it off with a toothbrush and 91% rubbing alcohol, let it dry, and then try again.  I'd also re-seat the DC-in's connector to the board.

I wouldn't really suspect the cheap AC adapter, unless it gets really hot during use.  For testing, though, it's best to use an OEM adapter, because they will behave more reliably.

Apple laptops are built just as well if not better than Thinkpads.  Moving to a Thinkpad will not put you in a better place, especially since you'll be using Windows, a far inferior operating system to Mac OS.

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