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How can I understand the jumpering system of a motherboard

Things like discharging the bios, clearing the password, clocking the motherboard or processor, setting the audio devices of the system etc. I am a student undergoing a three month intensive course in computer maintainance.

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Most motherboards dont have jumpers nowadays,( their all into sweatshirts) if they do, the usage of the jumper is described in the manual, & if u aint got one of them sqwint at the board, theres info on there., try manufacture website, but they do remove old manuals & drivers.
Dispite my words, Always will a CMOS have the provision to be shorted

Posted on Feb 19, 2009

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I have bought the used hp sp323071-001 ,I want to boot by DVD-rom but it doesn't boot and the bios has got a password which I don't know what it is , I tried to reset the password by removing the...


you could try Compaq as the bios password some manufacturers place this password on there computers for maintanance reasons
or you might
On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is. If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard. If all else fails, you may have to clear the BIOS password by resetting the RTC (Real Time Clock) IC (integrated circuit) on your motherboard. Many RTC's require an external battery. If your RTC is one of this type, you can clear the BIOS password just by unsocketing the RTC and reseating it. RTC's which require external batteries hope this helps

May 29, 2011 | HP Compaq Motherboard

Tip

How to Clear BIOS Password


Method 1 of 3: Using the Password Breaker

  • 1. Using another computer, load up your Internet browser. Go to this website, and write down the code shown on the locked computer.

  • 2. Pay the Small fee, and then enter the code you have written down. A few codes will be provided, so try them all until you find the one that works.
This also works for locked HDD drives, so make sure you take a look.
  • 3. You're computer is now unlocked! Keep the backup password handy, this will be invaluable if you locked out of you're pc again.
Method 2 of 3: Reset Jumpers to Clear a CMOS Password
http://www.fixya.comwrite_tip-bus3iqmg0jrasilho1abbg4j-3-0.jpg
  • 1. Unplug the computer and remove all peripheral connections like monitors and printers.
http://www.fixya.comwrite_tip-bus3iqmg0jrasilho1abbg4j-3-2.jpg
  • 2. Reduce electrostatic discharge (ESD). Wear a wrist strap to eliminate ESD, or make sure 1 hand is holding a metal piece while you are working inside the computer. Wear rubber soled shoes, and stand on an ESD mat if possible.
http://www.fixya.comwrite_tip-bus3iqmg0jrasilho1abbg4j-3-5.jpg
  • 3. Open the computer. Locate the CMOS jumper. The jumper will usually consist of 3 pins, though on the rare occasion, 2 pins (requiring you to supply the jumper itself). This often is labeled with "clear," "cmos," "password" or some abbreviation that indicates it is the password jumper. It is usually located near the CMOS battery, or processor. In laptops, it is often a dipswitch at the bottom of the laptop. Consult your motherboard documentation to find the location if you are unsure of where it is located.
http://www.fixya.comwrite_tip-bus3iqmg0jrasilho1abbg4j-3-9.jpg
  • 4. Make note of which pins the jumper covers. Remove the jumper. Reinstall it so that it covers the pin that is currently not covered. For example, if it covers pins 2 and 3, change it so that it covers pins 1 and 2.
http://www.fixya.comwrite_tip-bus3iqmg0jrasilho1abbg4j-3-14.jpg
  • 5. Reassemble the computer, and re-connect the power. Turn on the computer. Check to see that the password is cleared.
Clear BIOS Password Step 6.jpg
  • 6. Turn off the computer. Disconnect the power cord, and open it. Change the jumper settings back to the original position.
Method 3 of 3: Other Methods to Clear a BIOS Password
Clear BIOS Password Step 7.jpg
  • 1. Search online for generic CMOS passwords. Older computers sometimes have a generic password set by the manufacturer. To find one, search for the name of your manufacturer. Keep in mind that the computer password may have changed or no longer is in use.
Clear BIOS Password Step 8.jpg
  • 2. Download a utility to bypass the computer password. These can be found online and loaded with a CD or floppy disk.
Clear BIOS Password Step 9.jpg
  • 3. Take out the CMOS battery. Leave it out for longer than 5 minutes, and then reseat it. This will clear all BIOS settings, including the password. Keep in mind that you will have to reset the BIOS date, time and other settings.
Clear BIOS Password Step 10.jpg
  • 4. Contact the manufacturer. Find information about the motherboard, and call either the motherboard or computer manufacturer. They can tell you whether there is a CMOS default password or solder beads that must be jumped.




How to Clear BIOS Password

on Jan 15, 2015 | MSI Computers & Internet

1 Answer

Where can I find my jumper to reset my bio password on my hp computer?


On the edge of the motherboard - Most jumpers are located on the side of the motherboard for easy accessibility, verify by looking at all visible edges of the motherboard.

By the CMOS battery - Some manufactures will place the jumper to clear the CMOS / BIOS password by the actual cmos battery.

By the processor - Some manufactures will place the jumpers by the processor of the computer.

Under the keyboard or bottom of laptop - If you are working on a laptop computer the location of the dipswitch (almost never a jumper) can be under the keyboard or on the bottom of the laptop in a compartment such as the memory compartment.

Other visible location - While it is possible that the jumpers / dipswitches may not be in a visible location, most manufactures try to make things easier by placing the jumpers / dipswitches in another visible location.

If you cannot access the machine after if has been powered up, it is still possible to get past the BIOS password. The BIOS password is stored in CMOS memory that is maintained while the PC is powered off by a small battery, which is attached to the motherboard. If you remove this battery, all CMOS information (including the BIOS password) will be lost. You will need to re-enter the correct CMOS setup information to use the machine. The machines owner or user will most likely be alarmed when it is discovered that the BIOS password has been deleted.

On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is. If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard.

If all else fails, you may have to clear the BIOS password by resetting the RTC (Real Time Clock) IC (Integrated Circuit) on your motherboard.


hope this helps

Jan 10, 2011 | Computers & Internet

1 Answer

Hello! my name is Andrew I got a problem with entering a BIOS password on my hp compaq f500,motherboard version 442875-001.What is the version of BIOS on this laptop and what is the standard password for...


On the edge of the motherboard - Most jumpers are located on the side of the motherboard for easy accessibility, verify by looking at all visible edges of the motherboard.

By the CMOS battery - Some manufactures will place the jumper to clear the CMOS / BIOS password by the actual cmos battery.

By the processor - Some manufactures will place the jumpers by the processor of the computer.

Under the keyboard or bottom of laptop - If you are working on a laptop computer the location of the dipswitch (almost never a jumper) can be under the keyboard or on the bottom of the laptop in a compartment such as the memory compartment.

Other visible location - While it is possible that the jumpers / dipswitches may not be in a visible location, most manufactures try to make things easier by placing the jumpers / dipswitches in another visible location.

If you cannot access the machine after if has been powered up, it is still possible to get past the BIOS password. The BIOS password is stored in CMOS memory that is maintained while the PC is powered off by a small battery, which is attached to the motherboard. If you remove this battery, all CMOS information (including the BIOS password) will be lost. You will need to re-enter the correct CMOS setup information to use the machine. The machines owner or user will most likely be alarmed when it is discovered that the BIOS password has been deleted.

On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is. If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard.

If all else fails, you may have to clear the BIOS password by resetting the RTC (Real Time Clock) IC (Integrated Circuit) on your motherboard.


hope this helps

Jan 10, 2011 | HP Compaq Presario F500 F700 and G6000...

1 Answer

Removing bios password of toshiba portege 4010


HOPE THIS HELPS...BE SURE AND READ ALL BEFORE STARTING...GOOD LUCK

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.

Oct 16, 2010 | Toshiba Computers & Internet

2 Answers

Reset bios password


please give me lenovo sl400 bios reset password thanks

Oct 12, 2010 | Matsonic MS9158EP (DSMTSMS9158EP)...

1 Answer

How do I change pass word in bios setting?


hi
On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is. If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard.
If all else fails, you may have to clear the BIOS password by resetting the RTC (Real Time Clock) IC (Integrated Circuit) on your motherboard.
Many RTC's require an external battery. If your RTC is one of this type, you can clear the BIOS password just by unsocketing the RTC and reseating it.

May 25, 2010 | IBM Computers & Internet

2 Answers

How can I reset password for Bios Phoenix? the problem is that i can't run windows also


Try this, this is called "Backdoor BIOS Passwords" (manufacturers use these passwords for testing and maintenance.)

Reported Phoenix BIOS backdoor passwords include BIOS, CMOS, phoenix, and PHOENIX.

OR

Try removing your CMOS Battery. (Note that all CMOS information (including the BIOS password) will be lost. You will need to re-enter the correct CMOS setup information to use the machine. The machines owner or user will most likely be alarmed when it is discovered that the BIOS password has been deleted.)
Remove this battery along with the power cable from the power supply. Hold down the power button to fully discharge the system. Wait 2-3 minutes then reinstall the battery and plug in your system.

OR

Some motherboards have a 3 pin jumper by the battery. Lets say that the jumper is on pins 2 and 3. Remove the jumper while the machine is OFF and place onto pins 1 and 2. Power on your machine for a minute. (Note: Your system will not POST). Shutdown your machine and put the jumper back to pins 2 and 3. Power on your machine

-jwma

Jan 06, 2010 | Computers & Internet

1 Answer

No boot


Hi:
You need the manual.
You also need to know what bios you have.

Take the battery out for 24 hours.

Most motherboards I have worked on will not discharge in only a half hour. You need a lot more time than that.

You can also clear the cmos on the jumpers. Be sure you know which jumpers, otherwise you may damage the board.
By shorting two of three jumpers, the cmos will be cleared to factory settings.
thanks,

Aug 31, 2008 | Compaq Presario 1200,1600, Series CD...

1 Answer

Asus M2N-MX SE


remove jumber next m/baord battery, turn on the motherboard. turn it off and put back the jumber,
or remove the battery let it out for 15 min and put it back again.

May 06, 2008 | ASUS M2N-MX Motherboard

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