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Old 08-21-2009, 04:08 PM
 
Location: Gilbert, AZ
164 posts, read 769,948 times
Reputation: 199

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I'm having a problem with my laptop, an IBM Thinkpad T42 (running XP SP3 if it's important) Here's the deal:

I have it plugged into a known good outlet at the hotel I'm staying at. The icon shows it to be on AC power and it currently says 55% remaining (charging) but it is NOT charging and is functioning as if it were on battery power.

I tried the following so far:
1. Restarted computer - no difference
2. Removed battery, unplugged power adapter, and re-booted - no difference
3. Tried removing the battery while plugged into AC power - computer shut off (is it my power supply that's bad?)

Any help would be greatly appreciated!!!!
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Old 08-21-2009, 05:01 PM
 
Location: Matthews, NC
14,693 posts, read 24,205,332 times
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How old is the battery? Eventually, laptop batteries stop charging and the only fix is to buy a new battery. Here is a link to a diagnostic utility for the Thinkpad that may be able to confirm that they battery is bad.

Lenovo Support & downloads - PC-Doctor for Windows - Desktops / Notebooks
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Old 08-21-2009, 05:31 PM
 
Location: Gilbert, AZ
164 posts, read 769,948 times
Reputation: 199
Actually it's the same issue with two different batteries; one is the original, and the other was purchased approximately 8 months ago...... symptoms are the same for both.

I'm guessing the odds of both batteries going bad on exactly the same day are pretty limited......
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Old 08-21-2009, 06:16 PM
 
Location: Matthews, NC
14,693 posts, read 24,205,332 times
Reputation: 14362
If that is the case then the system board may be bad.
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Old 08-21-2009, 07:42 PM
 
Location: Asheville, NC
12,289 posts, read 28,659,708 times
Reputation: 5058
I had a problem with my DC jack. Sometimes, they can replace them, but other times, they have to replace the whole motherboard.
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Old 08-21-2009, 07:49 PM
 
10,812 posts, read 19,123,976 times
Reputation: 10363
It's either a bad power supply, bad DC jack, or bad logic board. Some thinkpads have a separate DC board so it could be that too.
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Old 08-22-2009, 06:30 AM
 
Location: Gilbert, AZ
164 posts, read 769,948 times
Reputation: 199
Thanks for everyone's help so far! Guess I find out for sure when I get home....... I have another AC adapter to eliminate that as a possibility.h
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Old 08-22-2009, 06:36 AM
 
Location: Gilbert, AZ
164 posts, read 769,948 times
Reputation: 199
Actually here's an additional update if it helps isolate the issue: I'm now running with the AC adapter, and even though the battery is not charging (it's showing 3%, charging) it's not dropping below the 3% threshold that shuts off my laptop automatically when on battery power. The 3% is at least staying constant rather than continuing to decrease......

Sorry for giving the info bit by bit, but I'm learning as I go.....
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Old 08-22-2009, 07:04 AM
 
Location: LI/VA/IL
2,480 posts, read 4,873,700 times
Reputation: 6658
Had the same thing several weeks ago.

I did not go through all the steps you did though. Went to my local computer guy and luckily it was just the ac adapter!
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Old 08-06-2010, 02:11 AM
 
1 posts, read 8,755 times
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It could most likely be due to a wrong AC adapter. Sure it could turn on your laptop but it could not charge the battery. The charging circuit would not even turn on because of the low voltage.

battery-company.com.au/laptop-battery-model.php/toshiba_PA3536U-1BRS_1_3684.htm
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