Question about Dell Latitude C400 Notebook

1 Answer

Lost system password

Dell D410
express service code 38742929920
service tag HSQJG1S

need the system password

Posted by on

  • pkg2 May 12, 2008

    Thanks for the method but this is not working.

    problem is at it is.

    anyway thanks for the solution.


  • pkg2 May 13, 2008

    it is written plz enter system or administrator pass word then press enter.we did is took the laptop battery , then the watch type cell from the motherboard concealed in plastic cover from there leed is coming and inseted into the socket, that cell is kept out and placed at the same point the new cell as old one is not good of no voltage, then placed the laptop battery. AFTER DOING ALL THIS THE GREY SCREEN SHOW SAME WORDING PLZ ENTER SYSTEM OR ADMINSTRATOR PASSWORD THEN PRESS ENTER.




1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 20 answers of more than 400 characters.


    An expert who has answered 20 questions.

  • Expert
  • 103 Answers

Only way to remove a BIOS password on any computer is to remove all power sources from the motherboard so its memory can be cleared.

First, remove the main battery from the laptop. Then you must locate and find the little coin cell battery (It looks like a watch battery) on the laptop and remove it for about a minute or so. Then you can replace them in the opposite order.

Your coin cell battery is in a bay on the bottom of your computer. Enjoy!
1. Before removing the coin battery:

2. Locate the memory module cover on the bottom of the system.
lost system password - exmem01.jpg 3. Use a Phillips screwdriver to remove the two screws securing the cover.
4. Lift and remove the cover from the system.
5. Locate the coin battery.
6. Use a fingernail (or small flathead screwdriver, if necessary) to release the blost system password - exmem08.jpgconnector.
exmem08.jpg exmem09.jpg

8. Reverse the previous steps to replace the coin battery.

Posted on May 07, 2008

  • Richard Wilbur May 12, 2008

    If it is not the BIOS password then specify that next time before you leave bad feedback. Your ignorance is no reason to destroy someones reputation.

    System PW = BIOS PW

    Windows Login PW = Windows Login PW

    Good luck getting answers when you treat techs like this.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Computer system, #6JKHTP1-595B, is protected by a password authentication system. I cannot access the data on the Dell inspiron N5030

You can request a master password from Dell to reset the BIOS password by calling (800)624-9896. You will need to provide your service tag and express code.

Oct 15, 2013 | Dell Inspiron Computers & Internet

2 Answers

Forgotten bios password I have a dell inspiron 1545 service tag # 9VZD3K1-595B

Dell Inspiron BIOS Password Recovery

Each Dell Inspiron has a master password which will clear the BIOS
password. You can get this number by calling Dell Technical Support at

Dell Technical Support will request the Service Tag and Express
Service Code from the bottom of your Inspiron.

If you were not the original owner of the Inspiron, Dell will transfer
registration of the used Inspiron from the original owner with only
the Service Tag and Express Service Code from the tag on the laptop.

To transfer the registration of a used Dell Inspiron, fill out the
Transfer of Ownership form on Dell's web site.

Mar 20, 2011 | Computers & Internet

3 Answers

How to bios password break in dell vostro 1015 model please do the need full

Hello Sir I can help you .Send me service tag which u can see on the bottom cover or turn on laptop u will see on screen hash code like this XXXXXXX-595B or D35B, A95B or 2A7B send me complete .i will send You MASTER PASSWORD Thanks.

Nov 13, 2010 | Dell Vostro 1500 Notebook

9 Answers

My dell vostro 1015 has bios password problem i forgot the password pls help me to find the password

send me the service tag wich u can see on the bottom cover or trun on laptop u will see on screen hash code like this XXXXXXX-595B or D35b or 2A7B send me complete .ill send u password .. this is my email

Sep 08, 2010 | Dell Vostro 1500 Notebook

4 Answers

Dell D420 Bios Password

I got my Dell Bios & HDD Master Pasword within a few minutes from

Jul 20, 2010 | Dell Latitude D420 Notebook

8 Answers

Need system unlock code for dell latitude

So I bought a Latitude D620 and I bet u heard this a million times already it came with the famous This system #xxxxxxx-xxxx, is protected by a password authentication system. Any help from the gods of this site would be appreciated. below are the numbers needed i believe,

CHZ0P2J Service tag
272-081-320-75 Express code
This system #CHZ0P2J-595B is protected by a password authentication system.

Any help would really be appreciated. thanks in advanced.

Nov 04, 2007 | Dell Latitude C400 Notebook

Not finding what you are looking for?
Dell Latitude C400 Notebook Logo

373 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dell Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18413 Answers

Alun Cox

Level 3 Expert

2678 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Are you a Dell Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides