Question about Dell Inspiron 6400 Notebook

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Dell INSPIRON 6400 locked

i just purchesed a laptop, dell inspiron6400 from ebay, and it is locked with a password .. its like a cmos password of something , i cant get passed no matter what i try, please help if you can.. its a gray and white screen that loads up asking for a password ..

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  • Anonymous May 03, 2008

    Dell INSPIRON 6400 locked problem, Bios Passwords

  • Anonymous May 11, 2010


    have u tried to press enter without typing anything when a gray and white screen that loads up asking for a password appears??



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You will have to go into the laptop I am affraid.
If you are not familiar with the internals of laptops I would advise you take it to a laptop service centre near you.
If you are confident then read on..
Remove the battery and mains power from the laptop.
Remove the plastic strip between the keyboard and the bottom of the screen (where the model number is printed)
Pop the keyboard out (careful of the connector ribbon)
Under the keyboard there is a metal cover. Remove that (keep the screws with it)
Under there if you look closely at the motherboard you will find a marking of CMOS with 2 solder pads side by side right next to it.
Press something metal between the 2 pads for a few seconds.
Before you put it all back together, just reconnect the power button panel, and use mains power to try and start the laptop. If all is well then the cmos will be clear and the password will be gone.

Failing that (or instead of that), remove all power to the laptop, and disconnect the cmos battery for 10 seconds. The cmos battery will look like a blob of plastic that has 2 wires going to a connector. It will be very small (the connector)

Posted on Apr 08, 2008


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Posted on Jan 02, 2017


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I would like to get a password to have access at a BIOS Dell Inspiron 6400.

Dell Laptop with bios or hard drive password set ? Unlock your dell laptop using the link below if it display a message that says "this computer system is protected by a password authentication system, you cannot access the data on this computer without the primary or administrator password, when you turn on the computer. This message is what you get if the BIOS is protected by a password. or you get system disabled

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if you dont have it you can buy an blue tooth dongle which is equally good and cheap too.

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Password Bios Losse

If you are the rightful owner dell will help you reset this.
but it will take some time.
you will have to remove the cmos battery (looks like a coin) under the keyboard and main battery
wait a few mins and try again.
if that does not work then only some techs knows what chip to short to clear.
like me.

Jan 26, 2008 | Dell Inspiron 6400 Notebook

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