Question about IBM ThinkPad T41 Notebook

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Ibm thinkpad no power with ac power adapter but works with battery

Need to know why ibm t41 works with battery but not with ac adapter

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  • edesvignee Oct 25, 2008

    after opening the laptop i found a blown fuse which i replaced and the laptop started charging the battery but will still not boot with the ac adapter alone. after the battery charges the laptop works fine on battery

  • edesvignee Oct 27, 2008

    thank you Bangjeha for the info I am in the process of ordering a new battery as this one in the laptop at present refuse charge any more. the laptop turns on but with all sorts of alams going off to switch ac adapter power but the laptop will not stay power on if the battery dies. battery power indicator 0%.

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If prior to this it works intermittently with the AC adapter, it means the connection from the adapter power unit to the motherboard was lost and this is a typical problem with the Thinkpad. It needs a re-soldering job and not something that one can do without a proper repair manual on how to open the laptop. Try googling your problem and find out if someone has the same experience and managed to resolder by him/herself.

Posted on Oct 19, 2008

  • bangjeha
    bangjeha Oct 27, 2008

    Good and congratulations on your success to fix it yourself. Yes, an IBM ThinkPad will need the power from the battery to be able to be operational. You cannot just use the adapter without a battery.

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1 Answer

I reinstalled XP on IBM T41, now battery won't charge. Could this be Driver Problem


Sounds like you need a new battery.
It's not just a battery in a case, it also has a small circuit board inside to control the charging etc, if that's faulty it won't charge, or if it has dead cells in it won't charge.

Feb 08, 2012 | IBM ThinkPad T41 Notebook

4 Answers

Hello my laptop t41 power is not even flash but the adapter is working,am technician and i have troubleshoot allot.


I concur with what Diegotech stated.

To iterate further;

1) The DC Power Jack (DC IN), may have cracked solder joint/s on the motherboard connector, (Female), where the DC Power Jack plugs in.

Resolder

2) The DC Power Jack may be broken.
Center Pin mount, and/or body of DC Power Jack, and/or Outer Shell mount.

Replace DC Power Jack.

3) Wires from the DC Power jack plug to the female connector on the motherboard, may be bad.

Replace DC Power Jack.

Two examples, of a place to buy an IBM ThinkPad T41 DC Power Jack,

1) http://www.buy.com/prod/dc-power-jack-connector-socket-for-ibm-thinkpad-t40-t41-t42-r50-r51-r52/q/sellerid/23962916/loc/101/215782035.html

2) http://www.machinaelectronics.com/store/buypart/IBM_Thinkpad_T41/DC-P001

Past this point it's a bad DC sensor on the motherboard.

Replace motherboard.

IBM ThinkPad T41 Service Manual, (Free),

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-ibmlenovo

On this page go down to the 8th line.
The one that starts with > ThinkPad T20.

Go across, and click on > T41

Takes approximately 2 seconds to see the first page, and additional time to fully download.

Page 142 for 14.1 inch LCD screen
Page 151 for 15 inch LCD screen

(PDF file page number box at top)

Dec 01, 2010 | IBM ThinkPad T41 Notebook

1 Answer

My ibm t41 just freezen and is not working at all


try to turn it off, pressing the power button for 10 seconds.
that should do it.
if that doesnt work, disconnect the ac plug, then remove the battery.
wait 30 seconds and start it again.

Apr 27, 2010 | IBM ThinkPad T41 Notebook

1 Answer

Barck the Power On Password


You MIGHT be able to get rid of the password by doing the following: Unplug the AC adapter. Remove the main battery. Find and remove the CMOS battery. Leave it like that for an hour. Put everything back. It will either work or it won't.

Mar 02, 2009 | IBM ThinkPad T41 Notebook

1 Answer

IBM ThinkPad T41 (9 Cell Battery)


It can over charge it.
it happens alot with laptops.

Feb 04, 2009 | IBM ThinkPad T41 Notebook

2 Answers

Battery not recharging.


Look on the charger itself & it will have the correct output voltage & polarity stamped on the charger. Then get a volt meter to verify if the correct output voltage is present. If the volt meter reads less than what is stamped on the charger, then I would recommend replacing the charger at that point.

Nov 20, 2008 | IBM ThinkPad T41 Notebook

1 Answer

IBM Thinkpad doesn't start


Visit Lenova's troubleshooting page at
http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-4YQJZX

I assume you have verified the battery and AC adapter with another machine or a voltmeter.

If none of the above get it going, you most likely have motherboard issues, possibly a blown fuse.

Or possibly a keyboard Power On switch problem.

Good luck.

Apr 28, 2008 | IBM ThinkPad T41 Notebook

1 Answer

IBM Thinkpad laptop wont start up


hi dear

Hi RD, Ouch! Have you tried taking the battery out to see if it will run on AC power when the battery is not installed? Sometimes a bad battery can kill the system.

Do you have a meter that you can measure the output of the AC adapter with to see if it is correct? If not, any chance you could swap adapters with someone for a while to see if theirs works on your computer and vice versa? A local shop may also be able to test your adapter to see if it's working.

oke

regards, cropp

Mar 27, 2008 | IBM ThinkPad T41 Notebook

1 Answer

IBM T41 Power issues?


Could a MoBo failure or nothing more that a connector- solder problem. I depends on your abilities- take it apart and have a look or Send it to a repair shop or Take it apart- shudder put it back together then send it to the repair shop ;-)

May 30, 2007 | IBM ThinkPad T41 Notebook

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