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I have a Dell c610 laptop and I want to change system setup. How do I clear the CMOS?

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Open it up. Take the cmos battery out. Tap on ur power button. Make sure all your leads and anything supplying power to it out. Tap on ur power button numerous times. Then put the battery back in. plug everything back in then wala. u have got a clear cmos.

Posted on Dec 04, 2008

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After clicking f2 and entering setup, what is the process of disabling the CMOS. After doing that, how do you save and exit and return to the operating system?


Were you locked out of windows? Clearing the CMOS will not fix that, it will only set your motherboard to standard factory settings. It is possible that in clearing the CMOS you have lost settings that are required to have the system start and until you reset those you may not be able to exit the bios.

Aug 12, 2015 | Dell Dimension C521 PC Desktop

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When booting my dell optiplex GX270 desktop,"alert! system battery low pops out, press F1 to continue or F2 for setup utility" and the screen colour chances. please, what do i do?


i think this is the problem about your cmos battery so first you change your cmos battery contained in your lap top.it is attached with your laptop motherboard.

Sep 03, 2011 | Dell OptiPlex GX270 PC Desktop

2 Answers

Where is the jumper to clear the cmos


Another way to clear the CMOS settings. Remove the BIOS/CMOS battery and short out the battery contacts with a paper clip then replace the battery.

Aug 11, 2011 | Dell OptiPlex GX620n PC Desktop

2 Answers

How can i reset my bios password ,logged out/dell computer


You can call Dell and they can reset the bios password for you. But if it doesn't have a warranty anymore you can simple open the casing of your computer and there's pin(jumper) on the motherboard that you can pull out and then put it back in. The password will be reset.


Oct 27, 2010 | Dell Dimension 4600 PC Desktop

2 Answers

My computer has a password on it when you hit the f2 button. How do I retrieve the password


Backdoor Passwords READ COMPLETELY!!

Many BIOS manufacturers have provided backdoor passwords that can be used to access the BIOS setup in the event you have lost your password. These passwords are case sensitive, so you may wish to try a variety of combinations.

WARNING: Some BIOS configurations will lock you out of the system completely if you type in an incorrect password more than 3 times. Read your manufacturers documentation for the BIOS setting before you begin typing in passwords.
Award BIOS backdoor passwords:ALFAROME BIOSTAR KDD ZAAADA
ALLy CONCAT Lkwpeter ZBAAACA
aLLy CONDO LKWPETER ZJAAADC
aLLY Condo PINT 01322222
ALLY d8on pint 589589
aPAf djonet SER 589721
_award HLT SKY_FOX 595595
AWARD_SW J64 SYXZ 598598
AWARD?SW J256 syxz
AWARD SW J262 shift + syxz
AWARD PW j332 TTPTHA
AWKWARD j322
awkward

AMI BIOS Backdoor Passwords:AMI BIOS PASSWORD HEWITT RAND
AMI?SW AMI_SW LKWPETER CONDO

Phoenix BIOS Backdoor Passwords:phoenix PHOENIX CMOS BIOS

Misc. Common PasswordsALFAROME BIOSTAR biostar biosstar
CMOS cmos LKWPETER lkwpeter
setup SETUP Syxz Wodj

Other BIOS Passwords by ManufacturerManufacturer Password

VOBIS & IBM merlin
Dell Dell
Biostar Biostar
Compaq Compaq
Enox xo11nE
Epox central
Freetech Posterie
IWill iwill
Jetway spooml
Packard Bell bell9
QDI QDI
Siemens SKY_FOX
TMC BIGO
Toshiba Toshiba

Toshiba BIOS

Most Toshiba laptops and some desktop systems will bypass the BIOS password if the left shift key is held down during boot
IBM Aptiva BIOS

Press both mouse buttons repeatedly during the boot
Using the Motherboard "Clear CMOS" Jumper or Dipswitch settings

Many motherboards feature a set of jumpers or dipswitches that will clear the CMOS and wipe all of the custom settings including BIOS passwords. The locations of these jumpers / dipswitches will vary depending on the motherboard manufacturer and ideally you should always refer to the motherboard or computer manufacturers documentation. If the documentation is unavailable, the jumpers/dipswitches can sometimes be found along the edge of the motherboard, next to the CMOS battery, or near the processor. Some manufacturers may label the jumper / dipswitch CLEAR - CLEAR CMOS - CLR - CLRPWD - PASSWD - PASSWORD - PWD. On laptop computers, the dipswitches are usually found under the keyboard or within a compartment at the bottom of the laptop.

Please remember to unplug your PC and use a grounding strip before reaching into your PC and touching the motherboard. Once you locate and rest the jumper switches, turn the computer on and check if the password has been cleared. If it has, turn the computer off and return the jumpers or dipswitches to its original position.
Removing the CMOS Battery

The CMOS settings on most systems are buffered by a small battery that is attached to the motherboard. (It looks like a small watch battery). If you unplug the PC and remove the battery for 10-15 minutes, the CMOS may reset itself and the password should be blank. (Along with any other machine specific settings, so be sure you are familiar with manually reconfiguring the BIOS settings before you do this.) Some manufacturers backup the power to the CMOS chipset by using a capacitor, so if your first attempt fails, leave the battery out (with the system unplugged) for at least 24 hours. Some batteries are actually soldered onto the motherboard making this task more difficult. Unsoldering the battery incorrectly may damage your motherboard and other components, so please don't attempt this if you are inexperienced. Another option may be to remove the CMOS chip from the motherboard for a period of time.

Note: Removing the battery to reset the CMOS will not work for all PC's, and almost all of the newer laptops store their BIOS passwords in a manner which does not require continuous power, so removing the CMOS battery may not work at all. IBM Thinkpad laptops lock the hard drive as well as the BIOS when the supervisor password is set. If you reset the BIOS password, but cannot reset the hard drive password, you may not be able to access the drive and it will remain locked, even if you place it in a new laptop. IBM Thinkpads have special jumper switches on the motherboard, and these should be used to reset the system.
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Sep 30, 2010 | E-Machines eMachines Desktop PC

2 Answers

I have a dell studio 1555. I did some thing with CMOS screen and I cannot start up WinXP afterward, a continuous reboot with dump screen (blue screen). Any solution ? Thanks


Hi,
This is problem with your CMOS setup.
Go to CMOS setup in that find your hard disk in that that change your hard disk mode from SATA to IDE save changes than ok

Sep 25, 2010 | PC Desktops

2 Answers

My Dell XPS 400 PC will not Boot up past the "System password"


Both the system password and the BIOS password are set in the BIOS CMOS. You need to clear the CMOS.

The online Dell service manual for the XPS 400 provides a clear and detailed procedure for clearing the CMOS. It's just a matter of moving some jumpers around:

http://support.dell.com/support/edocs/systems/xps400/sm/index.htm

If you are not used to working inside computers, start with "Removing the computer cover", then go to "System Setup" and click on "Clearing Forgotten Passwords".

Another method is to unplug the power cord and remove the CMOS battery for a 1/2 hour or so. For details on how to do that, try this website:
http://www.askvg.com/how-to-reset-remove-bypass-a-bios-or-cmos-password/

May 22, 2010 | Dell XPS 400 PC Desktop

4 Answers

Chassis intruded asus m3a78-cm


I actually did a little research on this one. I downloaded the User Manual for this board. USUALLY, there is a jumper on the board somewhere that needs to be set in the correct position. I looked through the manual and can't find a jumper for this . I even looked through the bios setting just in case it might be covered there, no luck. If you can't find an undocumented jumper on the board somewhere labeled something like TRPWR, then I would try the reset next. My suggestion would be to use the LCRTC jumper to reset the board. Heres the procedure according to page 1-17 of your manual:

Clear RTC RAM (CLRTC)

This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords.
1. Turn OFF the computer and unplug the power cord.
2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3 for about 5-10 seconds, then move the cap back to pins 1-2.
3. Plug the power cord and turn ON the computer.
4. Hold down the <Del> key during the boot process and enter BIOS setup to reenter data.

Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default position. Removing the cap will cause system boot failure!If the steps above do not help, remove the onboard battery and move the jumper again to clear the CMOS RTC RAM data. After clearing the CMDS, reinstall the battery.

You do not need to clear the RTC when the system hangs due to overclocking. For system failure due to overclocking, use the CPU Parameter Recall (C.P.R) feature. Shut down and reboot the system so the BIOS can automatically reset parameter settings to default values.

Feb 22, 2009 | Dell Dimension 4600 PC Desktop

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