Charging/Power problem

Ok, here is an interesting one.
The past couple of days I have been having a problem with my Powerbook. It seems the other day we woke up to find the battery dead and the ring light on the charger flashing green. This flashing is also accompanied by a slight clicking sound. I did some reading and testing and figured that my DC-in card is bad.
Here is where it gets interesting. With the power on or computer sleeping, the power light flashing green. The computer shows it is plugged in to AC power but no charging. Profiler also confirms this. Plugged in, not charging. I am now able to get the battery to charge with the computer shut down. I plug the computer in and I get the amber color on the charger ring as the battery lights flash accordingly. Eventually the battery will charge though sometimes I will need to unplug and plug back in because it will start flashing green again and stop charging. What the heck?!
Basically...
The battery will hold a charge.
The charger will charge the battery when the computer is not running.
The computer will not run off of A/C power.
Another note. This happened the morning after running the latest PowerPC update.
Help please.

Hi guys.
I am having a similar problems with my Powerbook G4 1,67 Ghz battery. Basically, when I unplug my computer (at 100% charge), I can only manage to use it for 20 minutes at most, and when it reaches a certain charge level - say, 90%, it then goes straight to 10% (instead of 89%) and then quickly shuts off without any warning.
I have tried:
- recalibrating numerous times
- resetting the PMU
- resetting PRAM & NVRAM
- deleting com.apple.powermanagement.plist
and, replacing batteries. But this just happened again with a brand new battery (purchased last week) at 100% battery capacity!!! (And my charger is also brand new, replaced 2 months ago).
Like many of you, *the first time I noticed the charge drop* (and shutting off without warning) *was after my update from 10.4.9 to 10.4.10* (I am still running Tiger on this computer).
And I don't know if this is related or not, but for a long time now, one of my two RAM slots have been dead (not recognized by the computer). I hadn't sent in the computer to be repaired because I use it for work every day and couldn't afford the repair time...
Any thoughts on what I should do? Again, I am dead sure that it's a hardware/software problem causing the sudden charge drop because I purchased a new battery just last week...

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Thanks for responding. My MBP is late 2009 and the battery has never been replaced. When I look at battery condition, it registers as normal, as it does when I do the power checks you suggested. When I plug in the power cord it glows green and within a few seconds it is on amber, until fully charged. I've done the SMC reset. I noticed this morning that after using it last night the battery capacity was 93% and an expected duration of about 5.5 hours was listed. After limited use this morning, restricted to email admin only, the charge level had dropped to 88%, but the predicted duration was only 2.75 hours. Currently the level is 73% and the duration is 3 hours, although I have accessed the web several times. Presumably there is some sort of algorithm that looks at current usage and predicts the duration. I will continue to monitor this to see what happens. In the meantime if you have any more thoughts!!!
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Howdy rcoo26,
It sounds like there’s an issue turning your MacBook Pro on when it isn’t connected to power, and the battery doesn’t seem to be holding a charge. The article below provides information that can help you troubleshoot the battery in your notebook.
Mac notebooks: All about batteries - Apple Support
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Hey guys (and girls ofcourse),
I'm having a very strange power problem with my late 2007 2.2Ghz santa rosa macbook.
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Hi Timo,
I think i have the same problem, my mac is not working without battery in it. and it wont charge it.
i wrote a post here http://discussions.apple.com/thread.jspa?threadID=2105648&tstart=0
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