Question about IBM ThinkPad T40 2373 Notebook

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Power not entering the laptop

I have an IBM T40 laptop and the battery has gone down, the problem is my laptop battery is not been charged by the PSU, even though the PSU is good as i have used it to power another laptop, how can u help ?

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  • wiro Apr 22, 2008

    Thanks a million, you guys are absolutely wonderful. You are star.

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Mark hit the nail on the head. . . "The power connector on the motherboard has broken free, it's a common problem on laptops."

I've repaired this type of problem more than a few times . . .The part usually is under $ 15. It's the time to do the job correctly that is usually intimidating. If you decide to attempt the repair yourself here are some handy hints:

1. Take your time
2. Check the web for pictorial dis-assembly guides.
3. Take pictures each step of the way (makes the re-assembly much much easier).
4. Keep all of the screws separate and in the order of dis-assembly (Re-assembly is a sanp this way)
5. Pay careful attention to each step in "taking the system apart".
6. When you get it finished get a power cord retention device to keep from putting pressure on the power pin and causing the problem again.

I use this one...

Posted on Sep 24, 2008

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There could be a few possibilities for this laptops problems.. but there are also soloutions.

  1. The power connector on the motherboard has broken free, it's a common problem on laptops.
  2. Your power supply is at fault and not working, easy to replace.
  3. A blown circuit at the power connector section on the motherboard.
The soloutions

  1. Repairing the motherboard connector although by most of us considered to be easy, is not so for non technical people. It can be repaired at a laptop repair centre without any trouble..biggest problem is cost.
  2. Power adaptors can be picked up anywhere almost. You can check your local laptop repair shop as above, and also get them to test yours while your there.
  3. This will bypass the 1st and 3rd problems above. If you look under the laptop you will see a funny looking connector about 3-4 inches long and skinny. This is for a port replicator. The power supply comes through the replicator instead of the power jack in the back of the laptop. The replicators are all over the place as well and easy to get. Check eBay or laptop repair centres etc. They are bound to have used ones laying around they have left over from things they got at auction houses.
The replicator is THIS little gadget. The other good thing is you can plug your laptop into it, and connect a desktop monitor, mouse and keyboard and use it like a desktop instead. You can also just use it as a laptop of course.

Posted on Apr 19, 2008

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The battery must have gone bad! if its three or more years old you need to get a new battery for the computer. Periodic conditioning of the battery from first use may prolong the battery life. Battery life is reduced by plugging computer with battery all the time.
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You should replace the battery. I wish I had a better answer, but that's pretty straight forward.

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Check your Battery if it take charge. Then check if ever your laptop start without the battery.

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What do you mean not charge?? If you have the AC cord in and the battery out will the laptop turn on with out the battery? If so your battery is dead and this is a common issue.

I suggest contacting IBM or finding one on ebay as they are much cheaper!

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Try taking the batter out and booting using just the power cord and Vice Versus'. Also when the power is plugged in does the charging light (Battery Indicator) blink or light up? If you know the Power Supply is good, then the Mother Board may have fried. If it's under warranty, take the Hard Drive out and send it in.

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Have you disabled your battery
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check control panel\power options
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then you can also check device manager for battery
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Jan 29, 2009 | IBM ThinkPad T40 2373 Notebook

2 Answers

My Ibm t49 the display shuts off as soon i as i boot up help


There are several possibilities within two categories:

SOFTWARE (you are using MS, so this is more likely)
HARDWARE these symptoms can be caused by bad battery and/or bad PSU (AC Power Supply Unit)

Software: You may have a virus, or may have damaged the NT kernel, or some critical software components by installing cheap games or bad SW. Read the recovery instructions on your XP CD to boot and run recovery and/or utilities that might repair the laptop OS. If you have no CD, try booting and hitting F6 key after BIOS screen... then explore the options there. Next, try booting and hitting F8 key after BIOS screen... then explore the options there.

If there are no problems repaired or evident in software, you should remove the battery, plug in the PSU and try booting. If all goes well, your battery is probably bad. If NOTHING happens, then your PSU is definitely bad (or the PSU cable/jack/connection to your computer is bad)

Conversely, remove the PSU and boot only with the battery. If it boots up (or goes farther than it did before) then the battery may be low/damaged BECAUSE the PSU is bad. If your laptop does not even open/get at least to BIOS screen, then the battery is dead. Try recharging overnight with laptop off but plugged into AC. If it is the same in the morning, replace the battery.

Both the battery and PSU can be checked with a VTVM, to compare voltage/output levels, with the ratings on the labels

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