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How to reset BIOS or CMOS Password

How to reset BIOS or CMOS Password

日本語記事はこちら http://rootdown.cocolog-nifty.com/memo/2015/05/bios-577f.html

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キーワード: BIOS Password, ASUS, Windows7, clear password, bypass password, flush CMOS

目次

1. How to reset BIOS or CMOS Password

2. How to use BIOS Master Password

3. How to clear CMOS Password 

4. Related Links

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1. How to reset BIOS or CMOS Password

If you forget the BIOS Password accidentally, or if you do not know the BIOS Password set by someone, we will show you how to reset / clear the BIOS password . I will introduce a cancellation method that can be used in cases where I do not understand the BIOS password, such as when I bought a used PC or when my predecessor at work pointed to quit without taking over the password. Please handle static electricity etc. when handling motherboard of PC. In the worst case, the personal computer may be broken. Be especially careful of static electricity when handling the inside of the personal computer, with the power cord and battery disconnected. Implementation is at your own risk.

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2. How to use BIOS Master Password

If it is an old personal computer before 200X years, the master password set by the manufacturer for debugging and support may be valid. If it is not an old personal computer, I can not expect much, but since I can easily try it, I think that it is worth a try. I think that if you hit it you should try it with a feeling of lucky.
These master passwords are published on many websites.

Index - BIOS-Chips - Verkauf und Programmierung - BIOS-Updates - BIOS-Recovery - BIOS-Repair - biosflash.com    
http://www.biosflash.com/index.htm
Index - BIOS-Chips - Verkauf und Programmierung - BIOS-Updates - BIOS-Recovery - BIOS-Repair - biosflash.com    
http://www.biosflash.com/index.htm
                                                                                                                                                                                 
Example of master password
AWORD 01322222, bios, lkw peter, 1EAAh, BIOS, lkwpeter, 256256, biostar etc.
AMI ami, amiami, CMOSPWD, amidecod, AMI.KEY, KILLCMOS etc.
Phoenix 12345
Hewlett-Packard CNU1234ABC
Dell 1234567-595B, 1234567-D35B, 1234567-2A7B
Compaq 12345
Sony 1234567
Samsung 07088120410C0000

3. How to clear CMOS Password

(1) How to clear the CMOS information by removing the button battery on the motherboard

The setting information including BIOS password is stored in the memory called CMOS on the motherboard. Although information disappears when the power is turned off, CMOS keeps the setting by constantly supplying power with the button battery of the motherboard.
By removing the button battery that supplies power to CMOS, you can clear the setting information including the BIOS password.
It is necessary to remove the button battery on the motherboard and leave it for about 2 to 3 minutes.

(2) How to clear with CMOS clear button

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There are also models that provide buttons on the motherboard to clear COMS.
By pressing this button you can clear the CMOS information and erase the password setting.

HP Compaq Pro 4300 SF - How to initialize the BIOS settings with the CMOS button
Http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c03790899

(3) How to clear with a jumper cap

It is possible to clear CMOS information by changing the jumper pins of "CLR COMS" or "CLRTC" on the motherboard. The change position of the jumper pin varies depending on the model. The following image is an example of ASUS motherboard case. Although it is hard to see, the part surrounded by red becomes a jumper pin of "CLRTC". Usually it is near the button battery of the motherboard. It is hard to understand, but if you look closely you will find it so please try looking.

CLRTC

above image using https://pixabay.com/static/uploads/photo/2015/08/11/11/50/asus-884108_960_720.jpg


4. Related Links


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