Tip & How-To about Computers & Internet

Clearing CMOS or Bios Passwords - Laptops

On desktop PC's there is usually a pin on the motherboard that you can jumper out to clear the password but laptops are a different animal. I ran into a very informative website posting that gave great information about backdooring the bios passwords.

http://www.tech-faq.com/reset-bios-password.shtml

Posted by on

Computers & Internet Logo

Related Topics:

Related Questions:

1 Answer

I cannot recover my bios password could someone help plz?


Hi,

Most motherboards have a jumper switch usually situated close to the CMOS battery. The jumper usually connects over 2 pins with an open pin next to these. By moving the jumper over to the open & center pin you will reset all BIOS settings, including your BIOS password. Move the jumper back to its original position before turning your PC on.
In some instances you will find no BIOS jumper. In such a case you can clear the password by removing the CMOS battery from the motherboard for a few seconds and then replacing it.

Best wishes,
Graemevm

Jul 25, 2011 | eMachines EL1352G-01w (884483537679) PC...

2 Answers

how to reset bios password


There are 3 ways to do this, first the easiest, changing it directly from the bios, of course if you could do that you probably would not need to. second, you will have a button / switch / jumper that will be on the bottom side of the motherboard, usually accessible through the memory or wireless card compartment. third is the actual small 3 volt battery that is hooked to the motherboard usually directly next to the button / switch / jumper.

Oct 29, 2009 | Lenovo ThinkPadĀ® Z60t (2511FDU) PC...

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

1 Answer

how do I reset my lost bios password for Dell Precision M70


Hi,
If you cannot access the machine after if has been powered up, it is still possible to get past the BIOS password. 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.
If all else fails, you may have to clear the BIOS password by resetting the RTC (Real Time Clock) IC (Integrated Circuit) on your motherboard.
The BIOS password may be cleared from a Dell Optiplex by removing the password jumper (PSWD) from the motherboard.
The location of the password jumper on a Dell Optiplex motherboard can be found by reviewing the Optiplex User Guides.
For most Dell Optiplex desktops, the steps to reset a BIOS password and clear all CMOS settings are:
  • Locate the 3-pin CMOS password reset jumper on the system board.
  • Remove the jumper plug from pins 1 and 2.
  • Place the jumper plug on pins 2 and 3 and wait approximately 5 seconds.
  • Replace the jumper plug on pins 1 and 2.
Each Dell Inspiron has a master password which will clear the BIOS password. You can get this number by calling Dell Technical Support at (800)624-9896.
Dell Technical Support will request the Service Tag and Express Service Code from the bottom of your Inspiron.

Thank You,
Your Support Tech.
Manish Shirsikar,
Fixya.com

May 18, 2009 | Dell Precision M70 Notebook

Not finding what you are looking for?

1,221 people viewed this tip

Ask a Question

Usually answered in minutes!

Top Computers & Internet Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

kakima

Level 3 Expert

102366 Answers

David Payne
David Payne

Level 3 Expert

14161 Answers

Are you a Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Loading...