[How to Reset Your Bios] -
How to Reset Your Bios
Discuss How to Reset Your Bios
Posted by: SHAWN
There are 2 ways you can reset your bios.
1. On the motherboard there is a small watch battery. 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. Your reset is now complete
2. 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. Your reset is now complete
This is a great troubleshooting step for those of you having POST issues or no POSTing at all. Like other troubleshooting steps, this will not always work but usually will depending on the problem.
[SIZE=1][i]I am not responsible for any damage that my advice may cause. Use this information at your own risk.[/SIZE][/i]
Posted by: nitestick
hmmm i see i'm not the only one whos sick of answering how to reset CMOS. could a mod please sticky this.
Posted by: JKnPA
nitestick...
I believe they are presently working on articles like this so posters can read them before making 'Redundant' posts.
Of course as we know...... a lot of new posters won't read them.
Shawn.... step#2.
MY MANUAL says: "Do not power-on with the jumper in the 'clear position', you may damage the board." Since the battery is the power source for the Cmos/Bios..... there is no need for main power to be on......... @ MSI
Posted by: SHAWN
[QUOTE][i]Originally posted by JKnPA [/i]
[B] Shawn.... step#2.
MY MANUAL says: "Do not power-on with the jumper in the 'clear position', you may damage the board." Since the battery is the power source for the Cmos/Bios..... there is no need for main power to be on......... @ MSI [/B][/QUOTE]
That is interesting because I do it all the time and it usually works however I have never damaged a board before.
Posted by: Juice Daddy
same here, in fact, I thought you had to turn it on for a second to allow it to clear...
Posted by: Ste
I know someone already mentioned it. but Its resetting the CMOS not BIOS...
Lol.
Posted by: PZEROFGH
You dont have to power on your machine, all i do is move from 1-2 to 2-3 for 10 seconds then move it back to 1-2 and CMOS is clear :D but my computer boots up even if i set my CPU at 4.0Ghz it just wont past the verifying DMI pool data and backup the cmos :D
Posted by: brady
What about setting the bios back to default by selecting [b]"Set to default?[/b]
Posted by: JKnPA
PZ.....
Thank you.........
Shawn.....
Just because you didn't kill your 'mobo', doesn't mean the process is correct; you may have damaged ICs within the CMOS that you don't know about....... yet!
The normal jumper positions are 1-2, not 2- 3.
* MSI probably just put that 'Warning" in their manuals
just to scare everybody......... FWIW....
Ste.... You are 'clearing the CMOS and 'resetting the BIOS'
[url]http://www.tyan.com/support/html/clear_CMOS.html[/url]
Posted by: HAVOC
The CMOS is special memory where your BIOS settings are stored. The CMOS battery is a back-up power source when the PC is turned off. Removing this battery when the PC is off, results in the clearing of settings in this special memory (CMOS). Those settings will reverted back to default.
The reason you remove the battery for a extended period of time is due to the Motherboard & CMOS's ability to retain a charge. By waiting a period of time (10 seconds to whatever) you ensure that all electrical charges will be dissipated. Then the CMOS will no longer retain your saved settings - BIOS reverting back to default. The CMOS Clear Jumper is basically a CMOS battery Bypass. Change the PINS and the battery no longer powers the CMOS. The waiting period still applies.
"The only time you want to use "CMOS Battery removal or CMOS Clear" is when you have made changes to your BIOS's settings and are unable to boot or re-access your BIOS." i.e (Overclocking or incorrect settings)."
Posted by: SHAWN
Someone Sticky this
Posted by: Juice Daddy
agreed/\
Posted by: harley3344
so this also means that if the computer is unpluged for an extended amount of time than it will be reset correct?
Posted by: pizzaboy0023
I need some help on bios
i have a Sempron 2800+ 1.8ghz
and its running at 1.33ghz
my Motherboard is a k7vme
Posted by: joshd
well, yea i suppose. but i think the battery lasts for a very long time, and i take it that it is rechageable?
Posted by: shdwsclan
[QUOTE]I need some help on bios
i have a Sempron 2800+ 1.8ghz
and its running at 1.33ghz
my Motherboard is a k7vme[/QUOTE]
This is not a bios resetting question, your bios is misconfigured.
Your core voltage is probably too low...
You will need to consult your processor manual to see what voltage is needed to generate what clock signal speed for your particular model.
Please make a separate post under Hardware Troubleshooting titled "help with bios configuration - sempron 2800 voltage" or somesuch...as long as the title is descriptive...
------------------------------------------------
Back to the topic at hand.
The CMOS is a sort of writable rom that contain customs settings for the BIOS to use.
Clearing the CMOS will cause the BIOS to use default settings....
Some boards have something called backup bios, and a secondary jumper set....
If you mess up a bios flash, you can set the jumpers on the board to flash your primary bios with the bios stored in the secondary. Then, after its done, set the jumpers back and your computer should boot, because you've actually force flashed your primary bios with a bios image stored in the backup...
Posted by: LeSig
Ok so I recently changed my fsb and now whenever I power up I get the dreaded black screen. From what I have gathered from this sticky I should simply open up my case and take this battery thing out for say 20 minutes then replace it and boot up and my BIOS settings should be set to default. Right? I just though I would clarify this before I go taking stuff out etc...Thanks
Posted by: Bumblebee Tuna
Here's a question, what about resetting the Bios on a notebook? My notebook turns on, but nothing comes up on the monitor, nothing.
Posted by: lazer_viking
[QUOTE][i]Originally posted by bradybnmci [/i]
[B]What about setting the bios back to default by selecting [b]"Set to default?[/b] [/B][/QUOTE]i don't know if someone has already said this but this problem is for those who have played with something too much or set some value too high and the computer wont even POST, not allowing you to access your bios.
as for the laptop thing, im sure there is a battery in that too if you take it apart but be CAREFUL. i've heard horror stories about taking laptops apart, not to metion it almost always voids warrentys.
to lesig: yes, exactly. but you needn't wait 20 minutes. about 15-20 seconds should do it.
Posted by: PW_Ranger
i think removig the battries will on clear COMS but not to clear the bios...Bios could onil be restore to the default mode....if u clear bios ur computer nid become a rubbish
Posted by: Meithan
PW_Ranger, what are you talking about? Clearing the CMOS resets your BIOS! Your computer won't become rubbish, it'll just boot with default settings.
joshd: yeah, the battery is there to keep the CMOS alive while there is no power, and it does last very long. However it's not rechargeable, so eventually it will run out.
This just happened to my girlfriend's computer. She's used the computer like twice in the past two years (the horror!), so it was off all the time. The CMOS was thus relying on the battery to save the BIOS settings. What ended up happening? The battery died. So now every time she turns off her computer and then reboots, the BIOS is reseted.
Posted by: Ste
[QUOTE][i]Originally posted by PW_Ranger [/i]
[B]i think removig the battries will on clear COMS but not to clear the bios...Bios could onil be restore to the default mode....if u clear bios ur computer nid become a rubbish [/B][/QUOTE]
Technically correct. But its easier to use both interchangably becuase people today don't like to say "Reset the CMOS" or "I entered the CMOS Setup".
Comptia A+ teaches it this way but noone seems to care.
Ive stoped argueing long ago because people like BIOS Better then CMOS.
Posted by: Meithan
[QUOTE][i]Originally posted by Ste [/i]
[B]Technically correct.[/B][/QUOTE]
Reviewing his post, you're right, he's technically correct. However it's all for the sake of clarity. I don't go around correcting people when they mix up speed and velocity, unless we're in a context where the distinction matters.
Posted by: ablaye
For Sempron 2800 series, removing the little clock battery from the motherboard should reset the BIOS (make sure you unplug your computer from the power source before you do this). Go back to your BIOS utilities and verify that time/date was reset.
Good luck!
Posted by: AT2005
Also to be noted. If you make a miscalculation while overclocking and your pc seems to hang at boot, remove the jumpers and re-insert them. I've seen so many people desperately trying to find out how to reset it.
Posted by: nickm926
reset bois and cmos jumpers, i did it when i overcloked tooo much, they are little pins with removable plastic bits on them, usually in the bottom right hand corner of the mobo
Posted by: Tcm9669
Thanks for that mate, but can this solve some Pc crashing problems? coz sometimes my Pc crashes, can this solve the thing?
Posted by: TheMajor
[color=darkred]Every motherboard is different I suppose. On my motherboard, I don't have to unplug the PSU to reset the CMOS. Also, I don't have to press the power button.
However, I recently experimented with a broken graphics card. Booting with it caused my BIOS to hang, even when using another graphics card afterwards. Resetting the BIOS only worked with my old card AND a PCI card inserted. I also had to press the power button to get it to reset properly.
But if I overclock too much, moving the jumper for 2 seconds will work.[/color]