郁闷，电脑主板自己锁定。

otherhiro

http://www.chinafix.com.cn/bbs/thread-58765-1-1.html
笔记本电脑的密码，都是存储在主板的一片EEPROM芯片中的，因此，必须要打开机箱，才能接触到这片EEPROM芯片。存储密码的EEPROM芯片，型号是：ATMEL的24RF08C 有些型号的笔记本上，使用的是另外一种EEPROM芯片： 即：93LC46 还有的EEPROM芯片，是24系列的： 对于EEPROM芯片中的数据，我们要读出来后，才能做进一步的破解工作，方法有： 1、使用热风枪把芯片吹下来，然后使用编程器读出： 2、使用小型的编程器，利用引出的接线，把主板上EEPROM芯片中的数据读出来： 有了读出来的KM6．bin文件，我们使用相关的破解软件，就可以知道你当时输入的密码了。
Read a 128 byte cmos backup (KM6.bin)
Keyboard : US
Acer/IBM [ $O QQQ]
AMI BIOS [ 9 ; c]
AMI WinBIOS (12/15/93) [9 f ]
AMI WinBIOS 2.5 [ f ][ ][ ]
AMI： [ ][- C ][ ][ C C ]
Award 4.5x/6.0 [3120230][2000230][13331333]
Award 4.5x/6.0 [3030030][3000333][3211102]
Award Medallion 6.0 [3011001][2001002][13331333][12211220]
Award 6.0 []
Compaq (1992) [197932]
Compaq DeskPro [?V19?932][? D"?BDD]
Compaq [][197932]
DTK [ ][1`P2oa]
Phoenix A08, 1993 [][7932]
IBM (PS/2, Activa ...) [ ][197932]
IBM Thinkpad boot pwd [197932]
Press a key to continue
在上面的显示中，对应IBM Thinkpad boot pwd 的方框中就是密码[197932]
★★笔记本密码破解专题★★前几天有网友笔记本被锁
现在我把网上流传的
和我知道的方法总结整理如下
希望对大家有帮助

IBM的：
对于IBM系列的笔记本电脑，有一种密码是power-on password，这并不是最高级别的密码，如果你设置了这种密码，可以通过下载硬件维护手册（hardware maintenance manual，HMM）来解决这个问题。一般硬件维修手册中，都有详细的清除power-on password密码的方法，并配有相应的图片。
[img]/qzone/newblog/v5/editor/css/loading.gif[/img]

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]


   以IBMT20、T21、T22、T23系列笔记本为例，我们可以在http://www.pc.ibm.com/qtechinfo/MIGR-4UYM3F.html下载它的英文版本的硬件维修手册(HMM)，通过查看说明书，我们知道，通过打开后机箱后盖，取下备份电池即可。


  其它版本的笔记本，按下面的方法操作：
　

P70, P75
To service a computer with an active, unknown, power-on password do the following.
1. Power-off the computer and unplug the power cord.
2. Remove the system-unit cover.
3. Short the two pins 1 together.
4. With the pins shorted, power-on the computer. This erases the power-on password.
5. Remove the short after POST is finished.

N45SL
To service a computer with an active, unknown, power-on password, do the following.
1. Power-off the computer and unplug the power cord.
2. Remove the battery pack.
3. Remove the math coprocessor access panel.
4. Locate the two override pins on opposite sides of the socket.
5. Install a jumper wire between the pins.
6. Install the battery pack.
7. Power-on the computer and leave it on until the LEDs blink and the computer locks up.
8. Remove the jumper wire.
9. Press and hold the lid switch, then power-on the computer.

N51xx
1. Power-off the computer and unplug the power cord.
2. Remove the bottom cover and the battery pack.
3. Locate the override connector on the system board.
4. Install a jumper over the pins 1.
5. Power-on the computer to erase the password.
6. After POST completes, remove the jumper. Otherwise power-on password will not be reset.

ThinkPad 240 [2609]
Short the jumper JP1

Thinkpad 310/310D/310E/310ED [2600]
Use switch SW2 near CPU socket (second bit switch couting from the lowest side)

ThinkPad ??? [2610]
ThinkPad 365C 365CD 365CS 365CSD 365E and 365ED [2625]
The following procedure disables user and supervisor passwords.
1. Power-off the computer.
2. Disconnect the AC Adapter.
3. Open the keyboard and remove the battery pack.
4. Remove the Mylar cover. See FRU Removals and Replacements
5. Locate the S2 switch block on the system board.
6. Set Switch 1 to Off.
7. Wait 30 seconds.
8. Set Switch 1 to On.
9. Replace the Mylar cover.
10. Replace the battery.
11. Connect the AC Adapter.
12. Power-on the computer.
13. Go to a DOS full screen.
14. Press Ctrl+Alt+F11 to access the setup screen and reset the passwords.

ThinkPad 355x [2619]
ThinkPad 360x [2620]
ThinkPad 370C, 750x, 755C, 755CS [9545]
How to Disable the Power-On Password:
1. Power-off the computer.
2. Open the keyboard and remove the battery pack and the diskette drive.
3. Remove the attachment holder.
For Models 355x and 360x, see >> 1115 Standby Battery
For Models 370C, 750x, 755C, and 755Cs, see >> 2105 Standby Battery
4. Install a jumper on the power-on password connector -1- at bottom left side of the system board.
5. Reinstall the diskette drive and the battery pack.
6. Power-on the computer and wait until the POST ends.
7. Verify that the password prompt does not appear.
8. After the service check is completed, remove the jumper.

Thinkpad 710T [2523]
To disable the power-on password:
1. Power-off the computer.
2. Remove the backup battery cover.
3. Locate the security switch beside the backup battery.
4. Move the slide switch to the opposite side.
5. Power-on the computer.

Thinkpad 730TE [2524]
Use the following procedure to disable the power-on password if needed.
1. Power off the system.
2. Remove the Pen Compartment Cover and the Sub Battery cover.
3. Identify the security pin wich is located beside the sub battery.
4. Power on the system while making a short-circuit between the two security pins with a regular screwdrivers flat tip.

Thinkpad ??? [9546, 9547]
1. Power-off the computer.
2. Open the keyboard, and remove the diskette drive or CD-ROM drive and the battery pack.
3. Install a jumper on the power-on password connector on the left side of the FDD connector.
(See Password Connector for location.)
4. Reinstall the battery pack and the diskette drive/CD-ROM drive.
5. Power-on the computer and wait until the POST ends.
6. Verify that the password prompt does not appear.
7. After the service check is completed, remove the jumper.

Thinkpad 300 [2615]
To override a password , do the following.
1. Power-off the computer.
2. Remove the access panel.
3. Remove the battery pack.
4. Remove the top assembly (do not disconnect any cables).
5. Connect a jumper to the two pads (R39) at the side of the math coprocessor socket.
6. Reinstall the battery pack.
7. Power-on the computer. Keep the computer on until the LEDs blink and the system locks.
8. Remove the jumper.
9. Press and hold the reset switch, then power-on the computer.
10. Power-off the computer.
11. Replace the top assembly and the access panel.

Thinkpad 350, PS/Note 425 [2618]
Remove the cmos battery 5 minutes

Thinkpad 365X, 365XD [2625]
1. Power off the computer.
2. Open the keyboard and lift the right-most section of the insulator sheet.
3. Push out the small door on the right side of the base cover.
4. Apply a short across the Power-On Password Jumper Pads.
5. With the jumper tool in place, power on the computer to clear the password.
6. Remove the jumper and power off the computer.
7. Power on the computer and verify that the password has been cleared.





ThinkPad 510 [2604]
1. Power-off the computer.
2. Disconnect all cables attached to the computer.
3. Remove the memory card access panel and DRAM card (if installed).
4. Power-on the computer.
5. Locate the two pins labeled PAD1-2 on the system board (see System Board Connectors).
6. Short the two pins together.
7. Press Ctrl+Alt+F3 to access the System Parameters Setup Menu.
8. Press Esc.
9. Press F5 to reset the parameter to their default values.
10. The System Time, System Date, and Password (if required) parameters need to be set manually.
11. Press Esc, then F4 to save the values, exit the Setup program, and reboot the computer.
12. If a DRAM card was removed, power-off the computer and install the DRAM card.
13. Install the memory card access panel.

ThinkPad 560, 560E [2640]
1. Power off the computer
2. Remove the frame
3. Flip the keyboard over as shown in the figure
4. Jumper the two password jumper pads (R364 or R39) located on the system board
5. Power on the computer to clear the password
6. Replace the keyboard and the frame
When replacing the frame, make sure that the frame fits correctly in place.
If it is not in place, the click buttons of the TrackPoint III cannot be pressed.
7. Replace the screws
8. Power on the computer and wait until the POST ends
9. Verify that the password prompt does not appear.
The hard disk password is stored on the hard disk.

ThinkPad 560x [2640-560 - 60x, 70x]
1. Power off the computer
2. Remove the frame
3. Position the keyboard over as shown in the figure
4. Jumper the two password jumper pads (BIT-X) on the system board
5. Power on the computer to clear the password
6. Replace the keyboard and the frame
When replacing the frame, make sure that the frame fits correctly in place.
If it is not in place, the click buttons of the TrackPoint III will not work.
7. Replace the screws.
8. Power on the computer and wait until the POST ends.
9. Verify that the password prompt does not appear

ThinkPad 560Z [2640]
1. Power off the computer.
2. Turn the computer upside down.
3. Loosen the DIMM socket lid screw -1- , and remove the DIMM socket lid.
4. Short the power-on password jumper pads (R522).
5. Power on the computer and wait until the POST ends. The password is cleared.
6. Reinstall the DIMM socket lid, and turn the computer right side up.
7. Verify that the password promp does not appear.
8. To reactivate the password, set the password again.

ThinkPad 570 [2644]
1. Power off the computer.
2. Remove the DIMM cover on the bottom side of the computer.
3. Short-circuit the two password pads.
4. Under the short-circuit condition, power on the computer and wait until the POST ends.
After the POST ends, the password prompt does not appear. The power-on password is removed.
5. Reinstall the DIMM cover.

Thinkpad 765D [9546]
Thinkpad 765L [9547]
1. Power off the computer.
2. Open the keyboard, and remove the battery pack and the diskette or CD-ROM drive.
3. Instal a jumper on the power-on Password connector on the left side of the FDD connector.
4. Reinstall the battery pack and the diskette drive/CD-ROM drive.
5. Power on the computer and wait until POST ends.
6. Verify that the password prompt does not appear.
7. After the service check is completed, remove the jumper.

Thinkpad 770 [9548/49]
1. Power off the computer.
2. Remove the DIMM cover.
3. Short-circuit the two password pads or put the jumper (pads near the top of the cover).
4. Under the short-circuit condition, power on the computer and wait until POST ends.
After the POST ends, the password prompt does not appear. The power-on password is removed.
If a jumper has been used for short the password pads, then remove the jumper.
5. Reinstall the DIMM cover.


E文看不懂的可以求助翻译软件或者痴心绝对版主
他的E文[img]/qzone/newblog/v5/editor/css/loading.gif[/img][img]/qzone/newblog/v5/editor/css/loading.gif[/img][img]/qzone/newblog/v5/editor/css/loading.gif[/img]
还有，如果你设置的是超级用户密码，用这些方法是清除不掉的，那时候，必须用专业的设备和技术才能解密
后面会有图和方法，但工具需要你自备
笔记本密码清除方法汇总

  很多人在笔记本电脑的BIOS启动设置了开机密码。可密码一旦忘了就带来很多麻烦。因为大部分笔记本电脑的开机密码并不像台式PC那样存放在CMOS电路中可以通过放电清除，目前很多笔记本电脑都是将密码保存在主板的逻辑电路中，一般手段无法破解。本文给大家介绍几种招术，试着对付一下这种问题。
  用清除PC机开机密码的方法。因为没有短路跳线，所以大家切断所有电脑电源（包括电池），打开笔记本，找到CMOS电池，取下后，等多几分钟再将CMOS电池放上。
  有些机器在改变硬件配置的时候，比如拆掉硬盘 内存什么的，再重启可能自动进入BIOS SETUP程序，接下来，就干该干的事了。
  试试在主板上找到代号“xxxx818”的芯片，如“MC146818”，它有24引脚，短接12,24引脚，或者找到标有“MC14069”的芯片。将其第14引脚接地一下。可以达到清楚密码的目的。
  使用者还可以使用口令软盘来解决问题。口令软盘在你每次设置开机口令时生成
  对于有些机器，还可以用一种较麻烦的方法。准备一张空软盘，用二进制编辑软件，如Norton DiskEdit 或 UltraEdit 32，修改软盘第一扇区的前5个字节，使其变为：4B 45 59 00 00 ，注意引导扇区是第0扇区，别改错了。然后保存修改，这样你就友一张钥匙盘了，放入笔记本软驱中，reset后，提示你输入口令是，直接回车。系统会再次提示输入密码。按Y回车。然后就看到BIOS的设置界面了。
T2X 系列笔记本密码被锁的破解方法

  下面以IBM笔记本电脑中，T20、T21、T22笔记本为例，介绍一下本站研究的密码破解方法：
  在使用硬件的破解方法之前，还要试一下你的笔记本密码是不是真的被锁了，试验的方法是：
  1、下载对应型号笔记本电脑的PDF格式的使用说明书。
T2X系列的说明书下载！
  2、按说明书中介绍的方法，清除笔记本的POP密码。POP即Power On Password
  3、如果开机不再问密码，说明你的密码没有被锁住，否则，就要按下面的方法用硬件的方法清除
硬件清除方法：
  笔记本电脑的密码，都是存储在主板的一片EEPROM芯片中的，因此，必须要打开机箱，才能接触到这片EEPROM芯片。具体开机箱方法，在此不说述

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]
非太平洋网图片，内容及服务网络与本站无关

  在下面指定的位置，找到EEPROM芯片：

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]
非太平洋网图片，内容及服务网络与本站无关

  这就是存储密码的EEPROM芯片，型号是：ATMEL的24RF08C

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]
非太平洋网图片，内容及服务网络与本站无关

  有些型号的笔记本上，使用的是另外一种EEPROM芯片：

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]
非太平洋网图片，内容及服务网络与本站无关

  即：93LC46

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]
非太平洋网图片，内容及服务网络与本站无关

  还有的EEPROM芯片，是24系列的：

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]
非太平洋网图片，内容及服务网络与本站无关

  对于EEPROM芯片中的数据，我们要读出来后，才能做进一步的破解工作，方法有：
1、使用热风枪把芯片吹下来，然后使用编程器读出：

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]
非太平洋网图片，内容及服务网络与本站无关

2、使用小型的编程器，利用引出的接线，把主板上EEPROM芯片中的数据读出来：

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]
非太平洋网图片，内容及服务网络与本站无关

  即然要用到编程器，就在用到一定的软件，软件的作用就是把EEPROM芯片中的数据读出来：

[img]/qzone/newblog/v5/editor/css/loading.gif[/img]
非太平洋网图片，内容及服务网络与本站无关

点击图片可放大图片
  有了读出来的KM6．bin文件，我们使用相关的破解软件，就可以知道你当时输入的密码了。
Read a 128 byte cmos backup (KM6.bin)
Keyboard : US
Acer/IBM                      [ $O QQQ]
AMI BIOS                      [ 9 ; c]
AMI WinBIOS (12/15/93)       [9  f  ]
AMI WinBIOS 2.5               [    f  ][  ][ ]
AMI：                         [ ][- C    ][ ][ C C   ]
Award 4.5x/6.0                [3120230][2000230][13331333]
Award 4.5x/6.0                [3030030][3000333][3211102]
Award Medallion 6.0           [3011001][2001002][13331333][12211220]
Award 6.0                     []
Compaq (1992)                 [197932]
Compaq DeskPro                [?V19?932][? D"?BDD]
Compaq                        [][197932]
DTK                           [    ][1`P2oa]
Phoenix A08, 1993             [][7932]
IBM (PS/2, Activa ...)       [ ][197932]
IBM Thinkpad boot pwd        [197932]
Press a key to continue
  在上面的显示中，对应IBM Thinkpad boot pwd 的方框中就是密码[197932]
DELL笔记本密码清除一法

  朋友的笔记本电脑是DELL的Latitude C640，属于较新的机型。开机之后提示：“该计算机已经被密码保护，必须输入正确的密码才能使用。”上网搜索以后发现有各种各样的解密方法，比如取下硬盘、用打印接口破解、短接818芯片等等，按照网上的方法一一试过后，都没有用。
　突然想到这台笔记本电脑较新，应该还在保修日期内，于是试着拨打了DELL中国公司的笔记本电脑服务部电话，没想到困扰了好久的问题不到两个小时就得到了解决，下面将具体操作流程介绍给大家。
　首先要向DELL的工程师提供该笔记本电脑的Service TAG（产品服务编号），编号一般在笔记本电脑的背面，将产品服务编号提供之后，说明原因。DELL工程师会要求提供一个E-mail地址，他会马上发送一个邮件到该信箱中，要求填好后发传真到指定的号码。
　约10分钟后收到DELL工程师发来的邮件，在附件中有一个Password.doc的WORD文件，按要求填入机型、Service TAG、因何种原因无法确认BIOS开机密码、联系人姓名、联系电话等等，个人用户还需要附上清楚的个人身份证复印件。最主要的是一定要填写好附注中的信息，需要针对不同的机型填写!
　打印后就可以发传真到指定的号码了，没有传真机的朋友也不用急，使用Windows提供的传真服务就可以了，具体方法就不再赘述，大家可以查阅相关文章。传真发送后大约20分钟笔者就接到DELL工程师的电话，说密码已经发送到信箱中，可以使用该密码解开这台笔记本电脑。还提示要注意两点：1.输入密码时屏幕上不会有任何显示；2.输入完毕后，一定要先按着“Ctrl”键再按回车键，如果不这样做虽然也能进入系统，但下次还是需要输入密码，并不能清除。按照此方法一试，果然解除了密码，顺利进入了系统。
　过程虽简单，但还是很实用的，要知道一般解密码可是要好几百元的，如果在保修期以内建议最好使用该方法。另外得到的这个密码已经是这台笔记本电脑的万能密码了，无论密码设置成什么样，都能用该密码解除。