Comments on: How To Crack A Laptop Bios Password

By: Albert van Bemmelen

Albert van Bemmelen — Sat, 22 Aug 2015 17:11:27 +0000

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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By: Jestine Yong

Jestine Yong — Fri, 15 Nov 2013 02:39:59 +0000

In reply to zdalgo.

Hi Zdalgo,
Thanks for your wonderful contribution and I believe lots of readers could benefit from your comment.

Jestine

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By: zdalgo

zdalgo — Thu, 14 Nov 2013 04:20:53 +0000

In reply to abderrahman.

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).

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By: admin

admin — Thu, 27 Jan 2011 00:58:31 +0000

HI Tom,

Sorry i do not have laptop repair book.

Jestine

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By: tom

tom — Wed, 26 Jan 2011 20:29:29 +0000

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

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By: admin

admin — Thu, 06 May 2010 19:31:26 +0000

HI Saratho,

May i know what you want to buy? I don't get your question.

Jestine

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By: saratho

saratho — Thu, 06 May 2010 06:55:19 +0000

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.

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By: admin

admin — Thu, 12 Nov 2009 11:14:51 +0000

Hi Ehim,

You may need to find more info from google seacrh.

Jestine

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By: Ehimwenma izevbigie

Ehimwenma izevbigie — Thu, 12 Nov 2009 08:16:54 +0000

i want to know more about laptops.what do i do

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By: admin

admin — Mon, 02 Nov 2009 11:58:23 +0000

Hi jhone,

Thanks for your great sharing-it was superb!

Jestine

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