Question about IBM ThinkPad T21 2648 Notebook

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Replacing the lithium backup battery in IBM T21

Employer provided new battery but replacement is on me unless I send the thing back and be without for repair and shipment time. I found the old battery under the main battery, but how do I get to the plug-in point?

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You'll need to remove the keyboard. Two screws on the bottom hold it. Then take a small flathead screwdriver and pull up one side, it will then lift up & out. You should be able to see the C-MOS battery connector.

Posted on Jun 12, 2008

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1 Answer

How large of a hard drive is supported on the ibm t21


The ThinkPad T21 is a laptop with a single drive bay.
You cannot setup this laptop with two hard drives in any RAID configuration.
You can add an external USB hard drive and copy/backup data to this hard drive.
OR
You can connect this laptop to a network and copy/backup data to another computer/server on the network.

Mar 16, 2009 | IBM ThinkPad T21 2647 Notebook

2 Answers

Starting ibm thinkpad


Errors 161 and 163 mean the time and date are not set in the CMOS. This typically means the CMOS backup battery is dead / going dead.

Mar 05, 2009 | IBM ThinkPad T21 Notebook

2 Answers

Starting ibm 600e


Hi there.
Errors 161, 192, 163.
All three of these errors are connected to the back up battery.
To resolve this problem:
1. open memory flap on base of laptop (small philips screwdriver required)
2. find the small connector with 1 black & 1 red wire coming from it.
3. disconnect above connector and gently pull the Red&black wires. The backup battery should just pull out from under the casing.
4. get replacement battery. Either
a. call IBM spares (07900 247 490 in UK) and ask for FRU:
02K6502. UK price is about £8 + £15 delivery + VAT.
b. if comfortable with soldering iron: Carefully open the packaging on the backup battery using a sharp knife.
Remove the solder tags from the battery (these are spot welded so need to be cut/broken off). Buy a new CR2025 battery from any computer shop, jeweler, or camera shop.
Using electrical tape, insulate all round edge of battery
Solder the leads onto the new battery - note polarity. Red wire to +, black wire to -.
Using more insulating tape, wrap battery so that all exposed metal is covered.
5. put new battery into laptop (reverse steps 1-3)
6. start up computer, error 192 has gone, but still shows 161, 163. Select OK.
7. reset date & time, and OK
8. when screen shows 'O / I' restart laptop using on/off switch at side.

Good luck and thanks for using FixYa!!

Mar 05, 2009 | IBM ThinkPad T21 Notebook

1 Answer

IBM Thinkpad T21


This is a common problem with the T20 series Thinkpad. The problem is with the power management chip. Unfortunately, you will have to replace the motherboard to fix it. Since these are a bit on the older side, you can get a motherboard off Ebay at a reasonable price.

Aug 04, 2008 | IBM ThinkPad T21 Notebook

2 Answers

IBM T21 doesn't start


try to start it with the battery out by pluging it straight, the battery is dead and its causing problems

Mar 13, 2008 | IBM ThinkPad T21 2647 Notebook

1 Answer

IBM Thinkpad T21


T21
Input Voltage: AC 100-240V, 50-60Hz Output Voltage: DC 16V, 4.5A, 72W Max

You can get one on EBAY for cheap.
http://cgi.ebay.com/Laptop-AC-Adapter-Charger-for-IBM-Thinkpad-T21-2648_W0QQitemZ300173112123QQcmdZViewItem

Nov 19, 2007 | IBM ThinkPad T21 2648 Notebook

4 Answers

IBM thinkpad T21


I had a similar problem after My pc got damp in a bag in the rain. I contacted IBM and was given this fix which I am supprised worked but it did so here it is cannot hurt to try. Remove the main battery and the mains power supply press the power on button for 17 seconds. This I think is to drain all the power from the laptop altogether. Replace the mains lead and turn on. Once the laptop has openen up into windows turn it off and replace the mains battery then power on again. In my case this worked I hope this helps.

Oct 17, 2007 | IBM ThinkPad T21 Notebook

1 Answer

IBM T21 shuting down


start your lap in safe mode and watch the shutting down time and let me know

Oct 10, 2007 | IBM ThinkPad T21 Notebook

1 Answer

Laptop won't boot


This could be an indicator of one of two things: 1. Bad motherboard 2. Short circuit. If you can, disconnect the CD-Rom drive, hard-drive AND the keyboard if possible. If you turn the laptop upside down you can normally see the screws relating to each of these components. Do one at a time and test to eliminate them. M

Aug 21, 2007 | IBM ThinkPad T21 Notebook

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