Any of you could help to repairing the power section of a laptop? - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 26th November 2006, 08:07 PM   #1
diyAudio Member
Join Date: Feb 2002
Default Any of you could help to repairing the power section of a laptop?

I have just bouth a new battery pack, thinking the other was not charging because was damaged. My bad surprice is that the brand new one, donīt charge also.
My laptop is a IBM thinkpad T40, and it works ok with the AC adaptor. Also worked ok the battery till got discharged. Seems that there is a bug on the power section that doesnīt allow chargint the battery. Do you think is any solution for me?
I think otherwise I would have to replace the maiboard, what would be quite expensive, or maybe buy a external charger.
Any genious here could give me a light?
  Reply With Quote
Old 26th November 2006, 08:31 PM   #2
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
Netlist's Avatar
Join Date: Jan 2003

Here's a possible solution.

  Reply With Quote
Old 26th November 2006, 09:18 PM   #3
diyAudio Member
Join Date: Feb 2002
Originally posted by Netlist

Here's a possible solution.


Whatīs the solution?
My laptop doesnīt charge "nothing" the battery. IT continues on 1% anymore.
  Reply With Quote
Old 26th November 2006, 09:35 PM   #4
jleaman is offline jleaman  Belgium
Join Date: Apr 2002
Send a message via AIM to jleaman
You have to take the laptop apart. There is a fuse on the battery terminal board that has blown. I bet that if you get he instructions or some one that knows how to take the laptop apart you could find it and resolder a new one on. OR if your comphy taking the laptop apart you could do it. Im sure you could search google for dsimantling pictures or even call ibm OR go to a authorized service center to get a tear down book. Im certified for many laptops so i don't need them but if you need help just ask.

  Reply With Quote
Old 27th November 2006, 01:35 PM   #5
jc2 is offline jc2
diyAudio Member
Join Date: Dec 2001
Location: Atlanta, Georgia
Does the battery information show up in power manager? Left click on the battery icon in the task bar, and select launch power manager, then click on the battery information tab.
  Reply With Quote
Old 27th November 2006, 02:11 PM   #6
karma is offline karma  Canada
diyAudio Member
karma's Avatar
Join Date: Feb 2003
Location: hamilton,ontario
i fix a lot of ibm laptops, there are chargers out there.

there are a few models where the pcb for the charger can be removed without replacing the mainboard. but im sure that model
is not the one

ibm is bad for that.
  Reply With Quote
Old 27th November 2006, 08:32 PM   #7
diyAudio Member
Join Date: Feb 2002
The battery icon on Xp shows 0% charged. Yesterday showed 1%.
I have opened it. Have to removed the modem board, and a little board that conects to the lcd to can see something. It has some IC, and could see a fuse F2, I couldnīt see anyother fuse, but this one seems ok.
I have checked also the backup battery and is ok also.
It seems not easy to repair for some with no experience on this, would need a miracle, or maybe some service.

Any of you could repair it for an aforable price better than bying another used one on ebay?
Iīm opened to repair myself, but I think I would need a guy who know this model and the jungle components there.
  Reply With Quote
Old 27th November 2006, 08:37 PM   #8
diyAudio Member
Join Date: Feb 2002
Do I need the IBM battery charger? Or could build a charger with a current AC at 10.8V plugged between pin + - of the battery? If this just work ok, would quite easy to do...??
  Reply With Quote
Old 27th November 2006, 08:46 PM   #9
diyAudio Member
Join Date: Apr 2002
Location: Cayman Islands
Since your ac adaptor works and the battery has been replaced I think its safe to eliminate those items.

I don't work on IBM's but that does not matter much.
It sounds as if the dc / inverter pcb, whatever IBM calls it has failed.
Its job is to take the power from the adaptor and invert if necessary and channel it to both the battery and the motherboard.
Some computers (usually older models) have this board as a daughter board which seats on the motherboard. Other models have it integrated into the motherboard. If it is separate then you can replace just the dc board otherwise its a motherboard replacement.
Some companies will do a repair / exchange with your old motherboard so you do not pay full price.
In any case, maybe you should see your friendly neighourhood IBM service centre so they can confirm the issue.
None of us are leaving this world alive. Enjoy it responsibly as you may.
  Reply With Quote
Old 27th November 2006, 09:11 PM   #10
diyAudio Member
Join Date: Nov 2006
Lightbulb Here's a possible solution

Most laptops have a power jack with internal mechanical switch that can become damaged when the unit moved and pluged in to the power adaptor. This is a common problem. It does require unit dismantling and solder work. Maby even part replacement if too badly damaged. This will prevent batery for being connected to the charger during operation with the power adaptor pluged in.

Best of luck
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
arcam delta 290 trouble in power amp section please help homertooties Solid State 12 25th September 2008 01:26 PM
repairing power supply guitar_joe Power Supplies 24 10th April 2008 03:40 PM
Seperate power supply for pre-amp section in integrated amp? KevinLee Solid State 8 2nd February 2008 10:20 PM
Cambridge Audio A1 power amp section schematic? Spev Solid State 2 10th July 2007 08:57 PM

New To Site? Need Help?

All times are GMT. The time now is 03:53 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Đ1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2