Question about IBM ThinkPad R40 2722 Notebook

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R40 2724-BU1 Power Problem

My R40 ThinkPad will not run on battery power and yes it is a good battery which works great on other notebooks. The power indicator light in the back shows orange at all times and never shows charge (green), the notebook was working fine and sat for a couple of weeks, now the battery issue.

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Re: R40 2724-BU1 Power Problem

Check the ac adapter. It seems your adapter is not charging it. Either the ac adapter or your dc port may be the problem. Is this the correct adapter, is it giving the correct voltage. These should be considered also.


Hope this helps you

Posted on Oct 21, 2007

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Dosent power on... Power pluged in and better installed.... but no hdd but it should go into bios.

try remove battery and charger then press power button for 25 seconds
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IBM thinkpad T30.The power button turned on then nothing boot up power LED light is on.Some time it boot up and run but then it won't do it nextime after it been power off. Battery for BIOS is good, Main...

There could e a problem with the battery. A fast check to determine whether you have a problem with the power adapter, power cord or the laptop's battery is to turn off the laptop, remove the battery, connect the power adapter, turn on the laptop & see if it works.
If the laptop works directly from the power adapter with the battery removed, then the power adapter is good. In this case we can suspect that the battery is defective & needs to be replaced.

Try also to reseat the main components of the notebook: the battery, the AC adapter, the memory modules, & the hard drive.
After that try switching it on & see if the problem was fixed.

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Power connector of T40 think pad loosen

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My ibm laptop contionusly beeps and says power scource is battery,when i press esc, it boots normally and shuts down in about 15 mins to half an hour

A. Bad battery
B Bad power supply.

Sounds like the battery isnt charging correctly , the beeping is warning you it is running out of power.

Take the battery out , and boot normally with the ac adapter.

Does it work?

If yes, Get new battery. about 70-90 dollars.

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links to parts

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R51 2887 NQ2 Thinkpad (not under warranty) not powering on. The problem appeared 3 months ago for the first time, but going through some forums, the problem got temporarily solved by removing the...

First, the simple things need to be checked. Is the power supply line, from the wall socket to the computer input socket, in good condition. Best test is to try it on a known working Thinkpad or with a multimeter if one is handy.
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Usually, hitting the 'F7" button while holding down the 'Fn' button (function button) will brighten your screen.

Also, if you're running on battery, to conserve battery power, most notebooks will dim the screen... you can override those settings by going into the control panel and into the power settings (easiest found on the old 'classic view').

If none of that works, your video display could be starting to go bad. Let us know how you fare and we'll go from there!

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Remove the battery. Check for voltage at the connector of the AC adapter. Plug adapter into the lap top and turn on. If it runs, yes, a new battery is needed.

When power up is attempted, does it make any sounds, can you hear the fan running or do any of the indicators light up? If so, you are getting power to the laptop. If not, you probably have an internal power supply problem.

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Your machine should run without the battery, just plug it into the power supply. You may check the powersupply itself. Maybe the power supply was bad and not the original battery. You can pickup one at a computer store. A universal costs around $100.00 to $120.00. The power supply is the (usually) the rectangle box that is part of the power cord. Let me know if that was it. Good Luck. Tim

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