I was thinking that you don't need to go to all the trouble of inserting a manufacturer's dongle into the printer port to bypass whatever settings are in the bois (such as a password). While it is the CMOS that is actually a memory in itself , similar to a motherboard's main memory chips , but it doesn't "clear" each time the computer is shutdown & reboot. While thinking , mainly , that this is a CMOS RESET in effect , you will find that most laptops have a CMOS battery that is fitted with a protective jacket / 2 wires and a quick connect/disconnect block (white). Only very old laptops have a CMOS battery where the 2 leads may be soldered directly to the motherboard. In which case , you either disconnect the plug-in connector , or desolder 1 of the 2 lead wires (preferably the red/+/or power) for approx. 15 minutes to allow a desoldered wire location to cool and for the CMOS settings to be reset to "default". Any of these procedures will effectively reset the CMOS or , as described - bypass the bios settings (other than the always present default settings).
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
yes sir thanx from your e-mail saratho in Zambia,jestine iam the person how like electronic.one, iwant to buy this test u have ,and mybe you can find me a secondhand please iam poor.iam very glad to rereive your e-mail thanx.
i am self employed with training in laptops repair i would like to get the books and equipments am based in tanzania africa . my main interest is to get top notch trouble shooting of laptop boards and how to repair cracked laptop screens
I have succesfully regained control of a Sony Vaio that the owner lost the log in code. Booting from CD/DVD, USB, or HDD was not possible because of this.
The only way possible to do this was to desolder the right 24c02 Flashable Eeprom on the Mainboard (there are several of these chips on the Vaio Mainboard.). The reprogram the only one right Eeprom chip by flashing the first 7 bytes to 00. (It could also have been FF but I think it was 00. So if 00 didn't work for you it must have been FF. Other choices are not possible I'm sure !!). And then resolder this chip back to the Board.
Carefully because these Eeproms are smaller than the standard 8 pins Soic SMD types ! And if you done this the Vaio will be working splendid again. I learned this fact from a Chinese Internet site.
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abderrahman
October 29, 2009 at 1:31 am
How To Crack A Laptop Bios Password
zdalgo
November 14, 2013 at 12:20 pm
I was thinking that you don't need to go to all the trouble of inserting a manufacturer's dongle into the printer port to bypass whatever settings are in the bois (such as a password). While it is the CMOS that is actually a memory in itself , similar to a motherboard's main memory chips , but it doesn't "clear" each time the computer is shutdown & reboot. While thinking , mainly , that this is a CMOS RESET in effect , you will find that most laptops have a CMOS battery that is fitted with a protective jacket / 2 wires and a quick connect/disconnect block (white). Only very old laptops have a CMOS battery where the 2 leads may be soldered directly to the motherboard. In which case , you either disconnect the plug-in connector , or desolder 1 of the 2 lead wires (preferably the red/+/or power) for approx. 15 minutes to allow a desoldered wire location to cool and for the CMOS settings to be reset to "default". Any of these procedures will effectively reset the CMOS or , as described - bypass the bios settings (other than the always present default settings).
Jestine Yong
November 15, 2013 at 10:39 am
Hi Zdalgo,
Thanks for your wonderful contribution and I believe lots of readers could benefit from your comment.
Jestine
jhone
November 1, 2009 at 9:48 pm
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/
admin
November 2, 2009 at 7:58 pm
Hi jhone,
Thanks for your great sharing-it was superb!
Jestine
Ehimwenma izevbigie
November 12, 2009 at 4:16 pm
i want to know more about laptops.what do i do
admin
November 12, 2009 at 7:14 pm
Hi Ehim,
You may need to find more info from google seacrh.
Jestine
saratho
May 6, 2010 at 2:55 pm
yes sir thanx from your e-mail saratho in Zambia,jestine iam the person how like electronic.one, iwant to buy this test u have ,and mybe you can find me a secondhand please iam poor.iam very glad to rereive your e-mail thanx.
admin
May 7, 2010 at 3:31 am
HI Saratho,
May i know what you want to buy? I don't get your question.
Jestine
tom
January 27, 2011 at 4:29 am
i am self employed with training in laptops repair i would like to get the books and equipments am based in tanzania africa . my main interest is to get top notch trouble shooting of laptop boards and how to repair cracked laptop screens
admin
January 27, 2011 at 8:58 am
HI Tom,
Sorry i do not have laptop repair book.
Jestine
Albert van Bemmelen
August 23, 2015 at 1:11 am
I have succesfully regained control of a Sony Vaio that the owner lost the log in code. Booting from CD/DVD, USB, or HDD was not possible because of this.
The only way possible to do this was to desolder the right 24c02 Flashable Eeprom on the Mainboard (there are several of these chips on the Vaio Mainboard.). The reprogram the only one right Eeprom chip by flashing the first 7 bytes to 00. (It could also have been FF but I think it was 00. So if 00 didn't work for you it must have been FF. Other choices are not possible I'm sure !!). And then resolder this chip back to the Board.
Carefully because these Eeproms are smaller than the standard 8 pins Soic SMD types ! And if you done this the Vaio will be working splendid again. I learned this fact from a Chinese Internet site.