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Where is Cmos Clear jumper on motherboard to clear Bios password.

I am trying to sort out daughters Acer Travelmate 311D, put cannot get pass Bios password, which is lost. I cannot find motherboard info. to find where Cmos Clear jumper is, any ideas please. Cheers, Malcolm.

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  • Anonymous Mar 12, 2014

    I took the cmos battery out of my laptop to clear the bios password but it didnt work,what else can i do?

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  • Acer Master
  • 32,281 Answers

If you can't find the jumper, just remove the CMOS battery wait for 1/2 + hour and the re-insert the battery. This will reset the BIOS back to the default settings and you then need to set the Time & Date.
It may not remove the BIOS password if the laptop stores the password on an EEPROM chip.

Posted on Apr 17, 2009

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2 Answers

Clear bios pass


Hello Seb, try removing the toshiba motherboard battery run the PC and it will ask for a new password (sort of) or try cmos jumper. If you can provide more info on the unit better. try google search for clearing bios password.

Jan 02, 2014 | Toshiba Computers & Internet

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I forgot my bios password, i want to reset my bios password


A. By Removing the CMOS Battery:

cmos_battery.jpg Almost all motherboards use a small coin sized CMOS battery to store all BIOS settings along with the password. To reset the password, unplug the PC, open the cabinet and remove the CMOS battery for approx. 15-30 minutes and then put it back. It'll reset all BIOS settings as well as the password and you'll need to re-enter all settings.
If it fails, then try to remove the battery for at least one hour.
B. By Using the Motherboard Jumper:
Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.

Jan 30, 2011 | Acer Aspire (AST180-US340B) PC Desktop

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How can i reset my bios password for an acer aspire laptop?


IF YOU KNOW THE BIOS PASSWORD YOU CAN GO TO BIOS AND CLICK ON CHANGE PASSWORD AND IF YOU FORGOT THE BIOS PASSWORD YOU NEED TO OPEN THE SYS. AND ON MOTHERBOARD THEIR IS A SMALL JUMPER THAT SAYS BIOS JUMPER ON IT YOU NEED TO REMOVE IT AND PUT IT IN PRONK 2 &3 AND RESTART THE SYS. AND THEN AGIN TURN OFF THE SYS. AND PUT THE JUMPER BACK TO PRONK 1 & 2 AS IT WAS EARLIER. AND IT WILL REMOVE THE BIOS PASSWORD.

Oct 25, 2009 | Acer TravelMate 2300 Notebook

3 Answers

Please help me reset my bios password on acer travelmate 2410


First you need to remove the laptop battery at the back side. Find some screw there and remove it locate the CMOS battery and jamper.

The BIOS password is stored in CMOS memory that is maintained while the PC is powered off by a small battery, which is attached to the motherboard. If you remove this battery, all CMOS information (including the BIOS password) will be lost. You will need to re-enter the correct CMOS setup information to use the machine. The machines owner or user will most likely be alarmed when it is discovered that the BIOS password has been deleted.

On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is.

If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard.

Oct 08, 2009 | Acer 4220-2346 Notebook

2 Answers

Same problem but have got acer travelmate 4150


Check on motherbord again you can find cmos cell it is look like round battery cell.
Then pull it for 10 minutes so all bios settings are defaults.
Also you can clear bios with jumper find jumper on motherbord it has 3 -pin 1-2-3 right now jumper is in 1-2 position set it to 2-3 position so your bios is clear.Then again set it to it's original position.
then it not ask for password.
Let me know if you need more assistance.
Thanks.

Sep 29, 2009 | Acer TravelMate 240 Notebook

1 Answer

Is there an overide bios password for my acer travelmate 2450 as i can not access the bios as it asks me for a bios password that i dont have


There is a "jumper" that needs to be shorted and power then applied to the board. Take the memory cover off the bottom of the case, take the first memory stick out, look on the motherboard for a set of points that are labeled J3 or Cmos reset. You will have to hold a thin piece of jumper wire on these points to "short" the connection while power is applied to the board, this will reset the Cmos and clear the password.

Sep 27, 2009 | Acer TravelMate 2300 Notebook

1 Answer

Acer travelmate 4230 bios password


This information is intended for experienced users. It is not intended for basic users, hackers, or computer thieves. Please do not try any of following procedures if you are not familiar with computer hardware. I'll not be responsible for the use or misuse of this information, including personal injury, loss of data or hardware damage. So use it at your own risk.
A. By Using the Motherboard Jumper:
In most motherboards CMOS battery is soldered, which makes it difficult to remove the battery. In this case we use another method.
Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.
When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.
Make sure to turn the PC off before opening the cabinet and resetting the jumper.

B. By Using Software:

I have found that BIOS/CMOS Password Recovery Tool is the most effective.:
BIOS/CMOS Password Recovery Tool is a program that works instantly to remove any lost or forgotten BIOS/CMOS password. Simply boot your PC to DOS and execute the program, and get access to forgotten BIOS/CMOS passwords in just seconds
BIOS/CMOS Password Recovery Tool Service: http://www.biospasswordrecovery.com/

Apr 30, 2009 | Acer TravelMate 4230 Notebook

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I lost acer 4520 phoenix set up bios password and i search at phoenix.com search bios password and click bios faq where is maybe the only way for fix it. so,i wondering if i can boot with a cd or looking...


try the from the support people or where you bought it they should reset the password but there backdoor password for bios if you want to try any. of them
phoenix PHOENIX CMOS BIOS

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How to reset bios password


underneath the button cover (plastic cover over power button etc) there is sw1 4 switches ,

put them all to on the power laptop then off again put switches back to what they were then on again

and presto bios password is no more

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