Question about IBM ThinkPad T20 2647 Notebook

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I have a Thinkpad T23 that will not always hold date and time. bought new CMOS and main batteries but still got problem. Damaged the M/B socket for CMOS battery and repaired it (I thought), but fault still existed but no so intermittent. It became more of a problem, so replaced M/B. I still get the fault. Its a good laptop but I now do not know what it could be, any suggestions? Thanks

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  • peter928 Feb 02, 2009

    Yep have now reset date and time settings many many times!
    I am now down to trying to find how I can check the battery supply is fed to the chip, but have no cct diagram!

    FWIW I dual boot fedora9 and XP but that should not be relevant.

    Thanks


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  • 54 Answers

I know this sounds lame. But have you checked the date and time settings? I had a laptop that was always 3 hours behind, the simple fix after trying a bunch of things was making sure that the time was set for my area ie: eastern standard time.

Let me know if this helps.
Please remember to rate me
THanks

Posted on Feb 02, 2009

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1 Answer

How do I remove the backup battery from my Thinkpad 2647 T23? I'm trying to remove the POP.


ThinkPad T23 2647

Manufacturer - IBM
Series - T Series
Subseries - ThinkPad T23
Machine Type - 2647

1) Remove ALL power. Remove the AC adapter (Charger), and Battery.

2) Battery removed, Battery Compartment facing you.

Look at the right inside edge. There is a small plastic cover inside the Battery Compartment.

Remove the one Philips head screw, then remove the cover.
Backup battery, CMOS battery, or RTC battery. SAME/same.
(Real Time Clock battery)

Also, here is the Service Manual,

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

Drop down to the 8th line. (ThinkPad T20. T20 in blue)
Scroll over, and left-click right on - T23

This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.

After you click on the file name, (T23), it may take up to 30 seconds, before the first page comes up.

Start on Page 66. Backup Battery is on Page 67.
OR,
In the Bookmarks menu to the left, click on -

1) The + sign to the left of -
ThinkPad T20, T21, T22, and T23 series.

2) The + sign to the left of -
Removing and replacing an FRU.
(Field Replaceable Unit)

3) Left-click right on - 1010 Battery Pack, and 1020 Backup Battery.

Nice to have when you are going to clean that puppy out.
(BUY, and wear an ESD wrist strap. Connect it's alligator clip to a good ground source.
Average price is around $3 to $6)

Also nice to have to upgrade the Processor, and a myriad of other things.

Regards,
joecoolvette

May 11, 2012 | IBM ThinkPad T23 2647 Notebook

1 Answer

Need password for entering windows. there is error 0271: check time and date setting. my friend said that the motherboard error, must be reset or change... what should i do???


I have the same problem with a desktop.

To bypass the error, You might need to set the correct date and time every time you power up your laptop. Date and clock setting can be set via CMOS configuration.

Jun 13, 2011 | IBM ThinkPad T23 2647 Notebook

2 Answers

Hello how to reset bios password of ibm thinkpad t23 2647


Hi,

To unlock the bios password on your laptop, you will need to remove the cmos battery on your laptop for some minutes and insert back, the cmos battery is located on the motherboard of your laptop, once the cmos battery is removed from the motherboard for some minutes, the bios password will be reset, and that fix the problem.

Take care.

Nov 19, 2010 | IBM ThinkPad T23 2647 Notebook

1 Answer

ThinkPad T23 white screen


1. your issue may be a bad hard, a damaged or loose flex cable to the LCD screen, a defective CPU (central processing unit, a cmos battery that needs replacement ( this is the battery that retains the information for the motherboard), a bad power supply regulator on the mother board.
2. this is just a few of the issue that have caused a white screen.
3. Laptops are mostly disposable and are usually good for 2to 3 years of service depending on the care taken.
Your friend probably thought he was helping by giving this to you to see if you could use it or part it out.
Not worth the work unless you are into PC repair or project work.
2.

Mar 03, 2010 | IBM ThinkPad T23 2647 Notebook

2 Answers

IBM Thinkpad will not hold date & time.


Replace the backup battery and run BIOS Setup Utility to reset the time and date. This will resolve the issue.

Sep 15, 2009 | IBM ThinkPad T22 2647 Notebook

4 Answers

My R40 Thinkpad loses the system date & time after being shut down for a while. However it does not lose it if only shut down for a few minutes. Any ideas please?


you need to change your cmos cell on motherbord circuit for that open back side cover and then you can see cmos cell on motherbord circuit.Change it pur chase new cmos cell.
Your old cmos cell has not enough waltage so your bios settings are not saved when you turn off the power.

Jul 16, 2009 | IBM ThinkPad R40 2722 Notebook

1 Answer

Cannot get my thinkpad 770ed to do anything..


Take the battery out and see if the system works on AC only. Sounds like you need to reinstall the OS and you may have an issue with the thinkpad not keeping the time and date. This is related to the other battery called the CMOS battery. This keeps your date and time accurate when the system is turn off.

I hope this helps. Thanks, please rate.

Feb 17, 2009 | IBM ThinkPad 770 Notebook

1 Answer

T23 BIOS error code #05


are you getting a date & time error ?. you could always try just resetting the bios.... remove the bios battery AND the battery itself for about five minutes or so. install it all again and boot up.

Robert

Aug 27, 2008 | IBM ThinkPad T23 Notebook

1 Answer

Always reverts to 1900


This indicates that the cmos battery is dead and needs replaced. The cmos is located under the main battery, it's in a yellow or greenish pouch with two wires leading to a connector. You'll have to remove the keyboard in order to get to the connector. Replacing the cmos will correct the time and date problem, if it doesn't fix the battery problem, you may need to go to IBM's support site and download the power management driver.

Aug 26, 2008 | IBM ThinkPad T20 2647 Notebook

1 Answer

T30 fan error


Hi,

Well, the fan is either unplugged from it's socket, froze up, or completely clogged with dust, etc and is giving the bios reason to shut down.

Also tho, tell me, does the time and date keep needing to be reset?

Could be a cmos battery. Some of the older thinkpads were like that, although my T30 has never shown this problem.

Good luck

Oct 15, 2007 | IBM ThinkPad T23 2647 Notebook

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