Question about IBM ThinkPad T20 2647 Notebook

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Hi, i have t42 lenovo. battery ran out and system shutdown. when i plugged in AC. my T42 is not booting up. Fan is running but nothing else.

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First, you need to make sure your power adapter is providing enough power to both run the laptop & charge the battery. A very good way to do this is to compare your laptop voltage & ampere requirements (written on a sticker on the bottom of the laptop) with the voltage & ampere ratings of the power adapter. Voltages should be the same, or the power adapter's voltage about up to 0.5 volts more than the laptop's voltage rating. Amperage of the power adapter should be at least equal to or greater than the laptop's rating. It should never be less than the laptop's rating, or else the power adapter will be providing insufficient amperes to charge the battery. Of course, the power adapter's nominal amperage might be ok, but it degraded on usage. You can verify this by testing using a good or new power adapter.
If the battery did not charge using the new power adapter, take the battery off the laptop, & using a dry tooth brush, scrub in between the fins of the battery connector on the motherboard & on the battery it self, then put the battery back into the laptop & try again.
If this still did not resolve the problem, then the battery itself could be bad. Try it on another laptop, or try a good or new battery in your laptop.
If this did not work, there might be a possibility that the charging circuitry on the laptop's motherboard is defective & needs servicing. In order to do this, the laptop needs to be disassembled & the motherboard checked for defective/burned out components in the area near the DC jack. Any defective/burned out components found should be replaced, or you might need to replace the laptop's motherboard altogether.

Posted on Sep 17, 2010

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My IBM T40 boots to a black screen with the "z"(light at top to right of power.


Try these steps:

1. Remove battery and unplug AC adapter
2. Press power on button for 30 seconds or so (one min is also too)
3. Attach battery and plug into wall
4. Power "ON" as normal

If you are still getting the "Z" and a black screen then I would have the video card or hard drive looked at and replaced. Start with the video card and then look at the hard drive


thinkpad-t42-wont-boot.html">http://www.techsupportforum.com/hardware-support/laptop-support/234433-ibm-thinkpad-t42-wont-boot.html

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My previously healthy Thinkpad T42, will not post.


Hi,
The Thinkpad T42 doesn't have a reset button on it like the older IBM's used to.

There could be a problem with the battery. With the machine turned off remove AC power and then the battery. Plug in AC power again and see if the laptop will boot without the battery.
If it boots let it load up as normal and then shut it down again, reinsert the battery and try to boot it up. If it boots fine, if not then there is a problem with the battery.

Please post back if you need anymore advice.


Good luck.

Jan 14, 2010 | IBM ThinkPad T42 Notebook

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My think pad t42 does not charge or work with electricity the battery is good and the charger but when i plug it to the power it dont charge the battery it don't work with electric pewer


if you are saying that the battery and the adapter can be use on another machine,just plug it in again on the machine and turn it on,if you can see the indicator but no display or the indicator also no light,means your system board is dead.change the system board,nothing else can you do dude.

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sound like the bios battery might not be charging, try changing this, its located on the motherboard.

you will have to refer to user manual if out of warrenty

Feb 16, 2009 | IBM ThinkPad T42 Notebook

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T42 is not starting


Try doing a manual system reset. To do this:
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2. Press and HOLD power ON button for 30secs. at least
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Jan 17, 2009 | IBM ThinkPad T42p Notebook

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Shuts down autometically


Also, have you changed anything lately? and, Did this just start happening out of the blue, or did something happen to cause this, ie... power failure, kicked the plug out, ran the battery completely dead, overheated, etc...?

Aug 26, 2008 | IBM ThinkPad T42 Notebook

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