Question about IBM ThinkPad 390x Notebook

1 Answer

BIOS/RTC/CMOS backup battery

Hi,Does anyone know where l can buy a cmos backup battery other than ibm please as the postage is 2 times more than the cost of it!!! regards

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,113 Answers
Re: BIOS/RTC/CMOS backup battery

Please tell us the type / part number of the battery and where you are located. It's a big world out there!

Posted on Aug 20, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I need to rest password in bios

Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords and CMOS settings to be cleared. BIOS password can be removed by temporarily disconnecting/ removing the RTC/ CMOS (Coin-cell) battery from the motherboard.
Disconnect the coin-cell battery from the system board and it will reset the BIOS to its default setting and the password would be gone.
Please Refer to Page 29, 106 & 79 of the REPAIR MANUAL IBM T40 for Battery removal, keyboard removal and RTC battery removal instructions.
The Backup Battery (RTC, CMOS) is located under the keyboard. So you have to remove the keyboard to access the battery. The above Manual from IBM shows the exact method/ instructions and pictures for laptop dis-assembly for the purpose.
If you are comfortable with working inside such electronics, you can't do it yourself, or else you may seek help from local laptop service professional.

Hope it helps! Good Luck! Thanks for using Fixya!

Jun 21, 2011 | IBM ThinkPad T40 2373 Notebook

1 Answer

Laptop not used for some years. could enter bios OK to reset Replaced U/S CMOS battery with no problem. Restarted............ Message press F1 ibm bios setup press F11 to invoke IBM product recovery...

I received an IBM laptop with same issue a few months back. The error message due to the drained out CMOS RTC (coin-cell battery), which retains and other BIOS settings.
The system is OK and all you have to do is to get the CMOS/RTC battery replaced by the a professional.
Good Luck!

Dec 31, 2010 | IBM ThinkPad R30 2656 Notebook

1 Answer

Error 00161 00163

I do not think you fixed the CMOS battery - (backup battery = CMOS battery)
According to the error codes, you have a dead backup battery and the time is not set. Makes sense?
(Dead battery.) 1. Go to Checking the Backup Battery
2. Backup battery.
3. System board.
(Time and date were not set.) 1. Set time and date.
2. System board.

Go to Find and download the user manual, and the "hardware maintenance manual."
Do you know how to get into bios/setup?

Start with the machine OFF. HOLD DOWN and CONTINUE TO HOLD THE "F1" key.
WHILE STILL HOLDING "F1", turn the power on, and CONTINUE TO HOLD "F1"
This will get you into the bios "setup." You should check the date, bootup order, etc, and reset.
I would check the "wire" you think you reconnected---you may just not have actually reconnected it.
The "hardware maintenance manual" shows you how to maintain this machine, and it explains the meaning of the error codes.

This will get you started on looking for the manual:

May 16, 2010 | IBM ThinkPad 380ED

1 Answer

I have 0271 error can get into bios but not able to change the date and time??


The error means that you have to change the BIOS battery first before trying to change the date and time.
As far as i know with IBM's the CMOS (RTC) battery is located under one of the panels underneath the laptop and is usually covered with red, blue or yellow plastic with wires coming from it. Disconnect the battery and replace it

Once the CMOS battery is replaced you can set the date and time and no more error messages.


Jan 24, 2010 | IBM ThinkPad T60 Notebook

3 Answers

Need to know how to reset power on password for hp

If this is a BIOS Lockout Password, then you would need to Pull the CMOS battery From the laptop... Which most likely means Complete Disassembly of the laptop just to get to the battery... You would have to unplug the battery... Make sure the Laptops Charging Battery is also Removed and the AC Adapter is NOT plugged in...
Once the CMOS battery is removed, Hold the power button down for 30 seconds... then replace the battery and see if it is bypassed/removed..

There is a good chance that the BIOS password is on a security chip on the motherboard and if this is the case, then pulling the CMOS battery will do you no good... You will need to replace the motherboard if this is the case...

Nov 16, 2009 | HP Compaq 6510b NoteBook Intel Core 2 Duo...

3 Answers

I have a Toshiba Satellite 1415-S173 with a bios password I don't know (original owner is deceased). How can I bypass or remove?

Remove the CMOS battery from the motherboard. Turn it over, open it up, and look for a little watch battery.

Oct 31, 2009 | Toshiba Satellite 1415-S173 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

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

HP nc6320 BIOS Power on Password

You Have to Remove RTC battery ( Cmos ) battery.
Wait approximately 5 minutes
Replace the RTC battery and reassemble the computer
Connect Ac Power to the computer. Do not reinsert any batteries at this time
Turn On the computer

all the passwords and all the cmos setting have be cleared.

Aug 12, 2008 | HP Compaq nc6320 Notebook

2 Answers

CMOS or RTC battery for this laptop : can it be replaced

Hi AshishB, Yes, Toshiba does refer to the CMOS battery in their literature as the real time clock battery. Your retailer is half right, the battery is on the motherboard but its attached via a connector and it can be replaced. Here are links to a couple of venders that sell the RTC battery for your laptop: - Http://,Satellite,L15-S104,Laptop,Batteries-Backup-RTC.aspx - Let us know if you have any other questions and please don?t forget to rate the posting.

Jan 18, 2007 | Toshiba Satellite L15-S104 Notebook

Not finding what you are looking for?
IBM ThinkPad 390x Notebook Logo

Related Topics:

676 people viewed this question

Ask a Question

Usually answered in minutes!

Top IBM PC Laptops Experts

John mullen

Level 2 Expert

229 Answers

 Mike M
Mike M

Level 3 Expert

3320 Answers


Level 1 Expert

29 Answers

Are you an IBM PC Laptop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides