How to Clear the CMOS - Reset the BIOS & Why

hey what's up everyone Giada the geek here and today I'm going to be showing you how to manually reset the bios using the clear CMOS jumper settings on the motherboard right so well the more familiar way of resetting bios is by loading the defaults when you log into the machine and you go into the BIOS and you're able to navigate through the various settings and you can load defaults or load optimize or reset to the default settings but this is for those who are either building a new system or troubleshooting a system or resetting when you can't log into the BIOS right so when the BIOS settings are wrong or they're not correct sometimes you won't be able to even go into the BIOS settings to reset or load defaults it nothing will even boot up you can't even select anything right so how are you supposed to reset the BIOS settings well multiple words not all but most will come with jumpers and I'll show you what that all means for you to reset the BIOS manually right so it's a hard reset with the physical multiple word and I'm going to show you with various Mullah boards here on how to do that exactly so part of the reason why you might be doing this is that when you order a new motherboard they might test it with their own hardware or their own CPU that they have lying around or for whatever reason they choose a specific CPU to test and to log into and testing the RAM and putting in memory chips and stuff like that and maybe they don't reset the settings back to original or default or for whatever agrees and this is just scenario this doesn't happen regularly but let's say that does happen and you go and buy the motherboard and you get your own CPU and obviously it's not going to be the same one that they use and this will carry the old settings for whatever CPUs they tested it on and you put in your new CPU and it's a newfangled CPU that just came out and the settings the old settings aren't compatible with your new CPUs therefore your motherboard just won't boot because it doesn't recognize the CPU in there and you won't be able to go into this the BIOS settings to be able to configure it properly for your new CPU so that's one type of scenario right and another type of scenario is that see this battery right here sometimes maybe if it the system's older or it's been unplugged for a really long time this battery is supposed to keep things like daytime and some of the settings that's hardwired or hard-coded into the BIOS some of your settings like how your CPU is going to run or how your RAM is going to run and maybe that battery isn't functioning properly or it's just been unplugged for too long and it's not holding a charge or didn't hold the charge long enough or maybe one little setting got forgotten or reset or something like that and then your system isn't able to boot if nothing's able to boot or the machine turns on but it's just not getting a any type of readout or any type of screen or anything like that you here the power supply kick on it could be that you need a fresh new battery and to reset the BIOS with the jumper setting gear so that could fix things I mean it's it wouldn't hurt to reset the BIOS when the system is not booting you're not really going to damage anything you'll obviously forget the settings if you had any customized settings or anything like that but that shouldn't for the most part damage anything further unless your CPU is damaged in resetting the BIOS just ain't gonna ain't going to revive and ain't gonna bring you back but anyways now I'm going to get into showing you where to locate the jumper setting and resetting it alright so here I've got a small form-factor multiples of micro ATX board and because of the size of the board it's actually this one was a little bit difficult to find where the jumper is for clearing the CMOS and I actually had to resort to the manual because most of the jumpers are somewhere around the battery but on this particular board because I guess it's so small it's actually located right down here next to the front panel jumpers and I'll go ahead and try to focus in on that right there right so this these two jumpers right here are the actual jumpers and this motherboard didn't come with a jumper this is the actual jumper right here I'm sorry these are actually the pins right that this little thing has to slip on to so let me try to stay in focus here and essentially you want to put this on like so like that so that means it's enabled so you are actually clearing the CMOS but it doesn't do it until you actually turn on the system so the system has to be plugged in you have to actually hit the power button and most motherboards that I've come across when you do so nothing happens I don't know why that is but basically nothing will happen some other boards however will actually turn on but nothing will display on the screen right so either way both those times most likely you were successful if it does nothing you're most likely successful if it does turn on but nothing shows up on the screen again you were most likely successful so it really it's kind of a crapshoot there's no way of telling positively so some of the motherboards you get might have a jumper on it and it might be on there like this where it's just on one of the pins right and there might be actually three pins and it's just telling you that it's on the off position so there might be another pin next to here so this jumper right here might be on the second and third pin and by moving it over to the first and second pin you are clearing the CMOS right and on this particular motherboard here it actually does say CLR underscore CMOS which is clear CMOS and it's right there for this particular motherboard right so this is one example mud board now I'm going to show you a couple more systems this is an Intel board by the way socket 1155 a newer socket motherboard and now I'm going to show you an older socket alright so here I've got a full sized motherboard and the CMOS battery is right here and the clear CMOS pins are here where the jumper would go let me zoom in on that alright so as you can see there right here is where the clear CMOS jumper goes into right so let me go ahead and plug that in there do be careful I'm not exactly positioned correctly to be doing this but if I did you wouldn't be able to see it that well sometimes you may even need a needlenose pliers and it doesn't matter which way you put this whether it's this way or this way but there is the tip here let me show you all right so this is what it looks like and so there's that typically this is the top and this is the bottom and you would be inserting it this way right so that's the top and you can see this little slot oh it's like that sometimes because I can't pinch it enough to get this thing out of there I would use a little push pin to kind of just get into that little hole there to pull it out all right so now let me show you how to plug this in and I apologize put my giant fingers here covering up everything but essentially that's how it goes alright so now that you have the jumper installed you're going to go ahead and plug in the power and you're going to hit the power button and turn it on again it may kick on and the power supply may turn on or nothing will happen at all both are in an indication that it did work and I'll explain how you can deduce that in a minute but essentially once you do that go ahead and unplug the power supply and then take off the jumper here and that's pretty much it you've cleared the CMOS now I'm going to show you an AMD system alright so here is an AMD system that I have and I really just wanted to show you this particular motherboard not for the fact that it's an AMD and not all AMD's are like this and Intel systems are also like this but I wanted to show you the example where I was talking about there's three pins so basically there's one two three pins there right and when it's not enabled to clear the CMOS it'll be on the first two pins here and then to clear the CMOS or enable clearing the CMOS you put it on the other two pins here and that will essentially clear it and so that's just an example of how it could be on your particular motherboard alright so now I wanted to tell you how you were able to deduce whether or not you we did reset the bios or flash the bios and that is that before you did any of this when you would hit the power button the machine would at least kick on maybe nothing would show up on the screen but at least the machine turned on and after you do the BIOS setting reset jumper deal when you hit the power button and nothing comes on most likely it did work because you went from it turning on when you hit the button and then putting the jumper on the pins and then hitting the power button and then it doesn't work then most likely yeah it has reset the BIOS so after you do that don't forget to take it off right the jumper and set it back and then you will have a reset bios most likely if you found the right jumper and you did the right steps and you do the right pins that should work out for you in resetting the bios alright I hope you found this video useful please comment rate thumbs up thumbs down whatever subscribe thanks for watching and I'll catch you later

Channel: Johnny Phung

Views: 4,516,379

Keywords: clear cmos, reset bios, erase bios, compatibility, setup, build, computer, repair, troubleshooting, bios, cmos, clr

Id: -9RnIj-EcdQ

Length: 11min 58sec (718 seconds)

Published: Tue Jun 19 2012