I found this forum while googeling my T43 2669 problem. I looked arround and here is some great info, but I couldn't find my problem.
I'm from Belgium, so my English isn't perfect - excuses upfront for that
Since a couple of days , I have a weird problem. When the laptop is running on AC, it says it is on batteries. When I unplug the AC adapter, it says the power source changed and is now running on AC - allthough it is not plugged in . If i plug it in again, it "switches" to batteries. I can do this infinite.
When the AC is in and "running on batteries" as shown in power meter, the battery is effectivly charging allthough power meter doesn't say so. And when the AC is out, power meter says it is on AC and that the battery is charging, but off course it is not. (I'm using XP pro btw).
So this isn't a too big problem if everything stays like this : i switched the power schemes between plugged in and batteries so I save power when I'm on "AC" (but actually running on batteries). But this results in one new problem : the laptop thinks it's on AC so it will not sound alarms when the battery is running flat. And it's happened twice that I lost some work done on the laptop because it suddenly shut's down because of lack of power
anybody have an idea as to what causes this problem ? it isn't the ACadapter as the laptop will boot on it without the battery in and it effectivly charges the battery. So that leaves motherboard or battery. I have only one battery so I can't try with another one.
EDIT : just been playing with it and watching what it does : when things are "inversed" with the AC in and the battery charging, when it reaches +/- 90% charged, it bleeps saying the power source has changed and is as it should be (AC in and displaying AC). pulling the AC out and back in at that moment, everything stays correct. It is only when the battery is below +/- 80% it changes back to the "inverse operation"