My 2008 Macbook only charges when it's sleeping. When it's awake, the MagSafe adapter blinks green on and off. I've cleaned the connectors and the problem is still there.

This is a recent problem, only since I updated the last security update from apple has this been happening. No matter where I plug the laptop in (as in, no matter the power source), the magsafe adapter glows green like it's going to charge, that lasts roughly a second and my mac behaves as if it's going to charge (different status bar indicator and brightness jumps).. aaand then the green light shuts off completely, mac brightness & status indicators go back to normal. Then the light comes back on, then shuts off, rinse, repeat. When I put the mac to sleep or shut it down completely, then plug the magsafe in, it works and charges just fine. But then the second I wake the mac up, the orange charge light shuts off and it goes into the green light loop again. Weird issue, just putting it out there to see if anyone's had that happen before and can offer tips. I've tried resetting the SMC and removing the battery when it's shut down, btw. Halp!

Hello brixton81,
Thank you for providing so much information about what you are experiencing with your MagSafe adapter. I recommend reviewing the article below to troubleshoot this issue. You have already gone through some great troubleshooting steps, some of which are in the article, and you can skip those since you have already taken them:
Apple Portables: Troubleshooting MagSafe adapters
http://support.apple.com/kb/ts1713
Thank you for using Apple Support Communities.
Best,
Sheila M.

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