The computer at my workplace is a Lenovo machine, I forget what series it is (P4 2.4G). A CMOS password was set, the kind where it asks for a password as soon as you power on. It was changed several times by someone, and now nobody knows what it is anymore. Is there any way to crack it without opening the case?
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中国DOS联盟论坛 » 其它操作系统综合讨论区 » Cracking a CMOS password
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Posted 2003-06-25 00:00 · 加拿大 安大略省 多伦多
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Posted 2003-06-25 00:00 · 中国 北京 科技网
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Yes, use debug.
Search with Google.
Search with Google.
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Posted 2003-06-25 00:00 · 中国 浙江 湖州 电信
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The bad thing is I can't even get into DOS (booting from the hard drive).
It asks for the password as soon as it powers on!!!
It asks for the password as soon as it powers on!!!
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Posted 2003-06-25 00:00 · 中国 上海 青浦区 电信
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Without opening the case, it seems there's no other way
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Posted 2003-06-25 00:00 · 中国 北京 科技网
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Then that won't work, you'll have to discharge it.
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Posted 2003-06-25 00:00 · 中国 浙江 杭州 华数宽带
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Use DEBUG under DOS
C:\DEBUG
-O 70 10
-O 71 00
-Q
Just reboot after that. This clears COMS, and it can also clear the password
C:\DEBUG
-O 70 10
-O 71 00
-Q
Just reboot after that. This clears COMS, and it can also clear the password
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Posted 2003-06-25 00:00 · 中国 浙江 杭州 华数宽带
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I didn't read it clearly just now,
then you'd better remove the battery.
Opening the case is no problem, Lenovo will still honor the warranty!
then you'd better remove the battery.
Opening the case is no problem, Lenovo will still honor the warranty!
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Posted 2003-06-26 00:00 · 中国 河南 驻马店 联通
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Since yours is a Lenovo brand-name machine, why not contact the manufacturer? Wouldn't that be safer?
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Posted 2003-06-26 00:00 · 中国 广东 深圳 宝安区 电信
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The simplest way is to open the case.
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Posted 2003-07-10 00:00 · 中国 上海 东方有线
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No chance
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Posted 2003-07-15 00:00 · 中国 河南 三门峡 联通
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Open the case, don't hold back
Floor 12
Posted 2003-07-16 00:00 · 中国 辽宁 沈阳 联通
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If it's a laptop, opening the case won't help either. You'll have to go to the manufacturer or a repair shop to crack the password. You can also find the chip that stores the password, remove it, read it with a chip reader, and then analyze it to find the password.
If it's a desktop, then you can.
(1) debug cracking method
After entering DOS, type or or
— o 70 10 — o 70 10 — o 70 20
— o 71 ff — o 71 10 — o 71 20
— q — q —q
(2) utility software cracking method
(3) BIOS flashing method
(4) battery discharge method
(5) jumper discharge method
If it's a desktop, then you can.
(1) debug cracking method
After entering DOS, type or or
— o 70 10 — o 70 10 — o 70 20
— o 71 ff — o 71 10 — o 71 20
— q — q —q
(2) utility software cracking method
(3) BIOS flashing method
(4) battery discharge method
(5) jumper discharge method
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Posted 2003-07-18 00:00 · 中国 辽宁 沈阳 联通
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Another way is to change the computer's hardware setup, temporarily unplug the sound card, network card, hard drive, or floppy drive, then reboot the computer. The BIOS firmware first checks whether the machine's hardware configuration matches the parameters in COMS, and if they don't match, it will initialize the COMS parameters at startup.
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Posted 2003-07-19 00:00 · 中国 湖南 长沙 联通
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Discharge it
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Posted 2003-07-24 00:00 · 中国 重庆 电信
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Won't booting from a floppy work? Then switch to the C drive, use the DEBUG command to clear the CMOS password, and then set the power-on password again.
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