Question about IBM ThinkPad T21 Notebook

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IBM T21 When I try to start my IBM T21, I get nothing but a millisecond green light on my battery icon on the keyboard. Could this be my CMOS? Thank you...

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Re: IBM T21

I have the same problem. actually its a common problem for many T21 and other old IBM laptops.
i searched that you have to take all power (batery, adaptor)
press the power 10 times and press it for 30 secs then reinsert the battery or adaptor and try to power it on.
they say its done to discharge a certain capacitor that got overcharged after overcharging the battery.
that worked for me before but now my T21 wont start any more with this process.

Posted on Jan 16, 2009

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Re: IBM T21

Assuming you are on AC wired power (through wall cube supply), then it may be either hardware failure (internal DC supply circuit) or CMOS chip. open the unit and look for a jumper that reads "RESET"

Posted on May 20, 2007

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Re: IBM T21

IBM Thinkpads do not use CMOS anymore. they use eeprom. You cannot reset by removing th ebattery or shorting a reset jumper or switch.

Posted on May 25, 2007

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Ibm thinkpad t21 comes on with error 0271 and then changes to what looks like a screen symol with a lock at the side of it. can you help please?

hi, ibm t40,t41,t42 etc. error 271 check date and time setting and wont cmos/bioss/pop password. solution 100%... you have change cmos battry but your problem still so dont worry. i'm solve problem. my email

Dec 06, 2010 | IBM ThinkPad T21 Notebook

1 Answer

My thinkpad t21 just died! It started 2 weeks ago when I would turn it on, sometimes the screen would not light up or come on. I could see in the shadow, if there was a light on the screen that it was...

Remove the battery and power cord. Hold the power button in while connecting the power cord hen the battery. This will reset the power distribution settings. If this does nor resolve the issue then you need a new power supply. With this machine a new computer would be less expensive.

Dec 15, 2009 | IBM ThinkPad T21 Notebook

2 Answers

It makes three beeps and the fan will be running and the power light will be on no screen display when you leave it running and switch off and on it works fine

check out your memory ram, try to replace it and switch on again,..also check your cmos battery, if it is low, then replace a new one....last options are to check and change the processors..try it

Oct 28, 2009 | PC Laptops

1 Answer

T21 IBM won't start intermittently

you have to check your RAM memory .
Some times this problem occurs becasue of faulty RAM or confliction between 2 RAM .
So check your RAM in other Laptop or try with only 1 RAM 1 by 1 if you have 2 RAM .

Thakns for using fixya.
Please rate thisd solution if it helps.

Jul 22, 2009 | IBM ThinkPad T20 2647 Notebook

2 Answers


Break BIOS Password 
A user may also put a BIOS password preventing you to even enter the system but if you wish to access the system do not worry we you can still do it. However, I only recommend this trick for your own personal use.

What is BIOS?
Bios stands for Basic Input Output System and is a firmware code run by a PC when first powered on, which is a type of boot loader. The primary function of the BIOS is to identify and initialize system component hardware (such as the video display card, hard disk, and floppy).

How to Break a BIOS Password?

The following steps work absolutely fine for a Desktop and are the easiest of all.
• Shut down the computer and take out all the plugs connected to electricity.
• Open up the CPU cabinet and locate the CMOS battery on the motherboard (it will be a silver circular battery just like a button cell).
Remove the battery and keep it out for some 2-3 minutes as this will flush out the CMOS memory which stores the BIOS password and all other configurations.

• Now place the battery back and start the computer normally.

Steps for Laptop:

• Open up the BIOS at the time of booting.

• There are some backdoor passwords which the manufacturing company had set that will be accepted by the BIOS. You will just need to know the make of your BIOS. Try out the passwords from these lists.
List of Award BIOS backdoor passwords:
List of AMI BIOS backdoor passwords:
List of PHOENIX BIOS backdoor passwords:

You may also want to try this utility CmosPwd 4.8

Oct 25, 2008 | IBM ThinkPad T21 Notebook

6 Answers

Comp probs

Remove the Thinkpad main battery. Look for a small yellow disk. This is the CMOS battery. It is connected to the motherboard with two (2) wires that plug into the motherboard. The plug is included on the wires of a new battery. Check EBay for Thinkpad CMOS batteries. I have also heard Radio Shack in some cases carries this battery.


Mar 25, 2008 | PC Laptops

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

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

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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