Question about HP Compaq Presario C306US Notebook

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Need to remove cmos battery to clear bios password for my compaq presario c306us.

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  • jamnego Jul 19, 2009

    Thank you - I really appreciate your assistance.

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  • 58 Answers

Hi
here's the service manual for your series

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&cc=us&dlc=en&product=3253904&

hope this helps
give me feed back

Posted on Jul 13, 2009

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1 Answer

How to reset BIOS setup password?


Well, I haven't worked on a Compaq for a few years but they're one of the models that respond to having the CMOS battery removed.

Basically, remove battery, find location of CMOS battery (usually under memory cover or HDD cover) and disconnect or pull it out for 30 minutes and you should be back to factory defaults.

Apr 25, 2015 | Compaq Computers & Internet

1 Answer

Unable to log in


Which operating system ?
The Compaq Presario CMOS password is an administrative security measure built into the firmware of a Compaq computer.

This password is stored in the motherboard's BIOS (Basic Input Output System) and provides for hardware-level security.

This password may be accidentally set or forgotten over time and must be reset in order to boot the computing system.

Disconnect the Compaq computer from any electrical sources and remove the side access panel from its case.

This may require the removal of one or more thumbscrews on the rear of the computer case.


WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL. http://www.kitchentablecomputers.com/static.php - rules

Locate the CMOS battery.

This battery is a round button-type battery located in the bottom-right corner of the Compaq Presario motherboard.

Grip the battery by its edges and pull it straight away from the motherboard to remove it.


Press and hold the power button on the case for ten seconds to remove any remaining electrical current from the computer.

This removes the CMOS settings and returns it to the default state of having no password set.

Replace the CMOS battery.


Replace the computer's side access panel and re-establish any previously severed electrical connections.
http://www.youtube.com/watch?v=zjGHpJqVJkM
Replace a CMOS battery inside a desktop computer

http://www.dewassoc.com/support/bios/bios_password.htm

http://www.tips4pc.com/articles/Computer Troubleshooting/Remove the CMOS battery to reset the bios password.htm

Jan 14, 2014 | HP Compaq Presario SR5450F (KJ383AA) PC...

1 Answer

Sirs I have not made any password for entering bios setup for compaq presario x1370 us, but when try to enter bios setup by pressing F10, display for administrtor password appears. What password could i...


But there is no need to worry. There are many known ways to reset / remove / bypass the password: Almost all motherboards use a small coin sized CMOS battery to store all BIOS settings along with the password. To reset the password, unplug the PC, open the cabinet and remove the CMOS battery for approx. 15-30 minutes and then put it back. It'll reset all BIOS settings as well as the password and you'll need to re-enter all settings. If it fails, then try to remove the battery for at least one hour. B. By Using the Motherboard Jumper: Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc. When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin. Make sure to turn the PC off before opening the cabinet and resetting the jumper.

Feb 25, 2011 | Compaq Presario X1370 Series Laptop...

1 Answer

How to reset laptop compaq nx6325 bios password


To remove the bios password you need to clear the CMOS.
Open your laptop casing look at your motherboard. locate the CMOS jamper it is near the battery. To clear remove the jamper and turn your computer on with in 5 to 10 seconds and turn it off. Reinsert the jamper back to there proper place and try to turn go to BIOS if there will be a password box appear.

You need to open your laptop and look at the motherboard and locate the CMOS battery. Just remove it with in 5 minutes to clear BIOS password.

Nov 30, 2010 | HP Compaq nx6325 Notebook

2 Answers

How to clear compaq v3000 laptop password cmos battery open but nothing clear please help mp immideataly jumper not found


>Go to this link:
http://www.syschat.com/download120.html

click on the "DOWNLOAD" button to download a program for CMOS reset...

>comments suggestions ratings and violent reactions will greatly be appreciated thank you...

Sep 26, 2010 | HP Compaq for Presario V3000 Motherboard

1 Answer

Give me password for compaq evo n600c


You can remove your bios password by reseting your CMOS battery or jamper. You need to open your notebook remove first the battery and all screw at the back of your notebook. You can see there a CMOS battery together with the CMOS jamper. Just read it you can read CLRSCR which means clear cmos, just pull it with in 10 seconds and insert it back. Now you are done to reset bios.

Mar 03, 2010 | HP Compaq Evo Notebook N600c

2 Answers

Power-On Password on Compaq Presario C300


YOu can reset bios password with 2 method.
(1) open back cover of laptop then find motherbord .Pull cmos cell from motherbord for 15 minutes then again put it in it's position .then it not ask for password.
(2)You can clear password with jumper settings find jumper on motherbord named clear cmos it has 3 pin .1-2-3
Put jumper in 2-3 position then again put it in 1-2 position then check .
Let me know if you need more assistance.
Thanks.

Nov 09, 2009 | Compaq Presario Notebook

1 Answer

Bios password


The master password for Compaq is "compaq"
If that doesn't work you need to use a jumpe on the motherboard:
This Jumper is often named like: "RTC_CLEAR" , "CLEAR CMOS" , "CLRCMOS" , "CLRCMS". His position is often near by the motherboard battery. You will need to reconfigure any BIOS changes that you have done.

Mar 17, 2009 | HP Compaq Presario V3000T Notebook

1 Answer

Clearing bios pasword on my compaq presario


compaq and hp bios password are easy to clear. all you have to do is unplug your laptop, remove all batteries, then you must open your laptop and locate the cmos battery and unplug it for about 3-5 seconds. then put it back together.

Dec 07, 2008 | HP Compaq Presario 730US Notebook

1 Answer

Frogot password


It would help if you will clear the BIOS or the CMOS of the laptop. It can be cleared by pulling out the cmos battery of the laptop for a long period of time or by locating the jumper/dipswitch on the motherboard that would clear the BIOS. You may go to these links on ways on how to clear an unknown BIOS password.

http://www.computerhope.com/issues/ch000235.htm

http://articles.techrepublic.com.com/5100-10878_11-5031589.html?tag=rbxccnbtr1

http://www.uktsupport.co.uk/reference/biosp.htm

May 07, 2008 | HP Compaq Presario V2000 Notebook

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