hello my name is Jason Johnson and thank you for watching I hope you find my
videos helpful and thank you for subscribing to my channel if you have
any questions or feedback for me you can leave a comment below and I'll answer as
quick as possible or I'll try to point you in the right direction this video is
going to be over chapter 3 part 2 for the netacad IT essentials and again this
is chapter 3 part 2 of 3 part 2 of 3 and the links to parts 1 & 3 should be in
the description below on the video so in this video we're going to look at the
BIOS and the boot up of a computer so we in the previous video we looked at
assembling the computer of the case putting the motherboard in putting
everything in and booting it up this video we're going to look at what
happens next so when we boot a computer up if everything was connected properly
and all of the components are working properly so we'll qualify the
information with that so as long as everything's working properly you should
get a boot up and so you should see a BIOS screen and we'll look at a example
of that here in just a minute and you should get a BIOS or a basic when we get
this booted and that bio stands for basic input/output system and the BIOS
is going to provide some beat codes if you don't have certain things plugged in
properly or if something's missing for example if it can't find a hard drive or
if it can't find the if the Rams not seated properly on the motherboard
you'll get a certain type of beep codes and the beep codes do mean something so
you should consult the BIOS manual or the manufacturer of whoever is whoever
the BIOS is for the motherboard manufacturer and understand what those
beat codes mean so as that computer boots up it's going to check all the
critical components it's going to do a post test the firmware that's built in
on the motherboard is gonna be the be either B BIOS or UEFI and it's gonna use
beep codes to indicate any errors and critical components such as video card
memory and i/o devices are going to be checked and then a post card can be used
debug a post problem by the way so if you're having problems there are cards
that you can plug into your motherboard to find out what's going on if you need
to get to that I've never used one in my career but I do know and you elevate
that to the next level to find out what's going on you can do that so you
find out what the problems are you might want to check the BIOS firmware and find
out the date of that and find out if it needs to be updated and you might just
go ahead and update that before you do any operating system or anything else
because sometimes that can eliminate any problems that you might have so
motherboards need firmware to operate and they have that built in but there
are also updates to that so some BIOS some aspects of the BIOS can be updated
or some things can be changed on there and then settings are then stored or the
settings for the BIOS are then stored in the CMOS which is written on the
motherboard which it gets saved that that does not disappear when the
computer reboots but that gets saved and it's a little bit more permanent and I'm
on this next screen I'm gonna show you an example of a BIOS here and you
usually just use your mouse our excuse me your keyboard to move around you
don't have mouse features with most BIOS some of the newer ones do have some
Mouse functions with the with the BIOS but for the most part they're still just
keyboard driven so you have to move around with your keyboard and you just
have in in different bios's have different features depending on the
motherboard and so you just need to consult with the BIOS manufacturer on
the motherboard manufacturer to find out what features your motherboard has on
the but for the BIOS now the BIOS setup program allows does allow you to change
the settings it allows you to change some settings in there set a password
for the boot up some things like that it can be accessed by moving around with
the keys or a combination of keys but you want to again refer to the
motherboard documentation on that when you get to the UEFI setup it's also
built into the firmware it also performs some of the same tasks as the BIOS and
it eventually will make the BIOS obsolete eventually a ue f i will be on
all motherboards and bios will go away but it can also be accessed by kissing
pressing a proper key or combination during the startup
sometimes f10 or shift f10 or f2 or f8 it really just is going to depend on the
motherboard which key combination you have to press and you want to refer to
that documentation to find out which one is going to be the proper key
combination now with the BIOS information it can it provide
information about installed hardware including the CPU in the RAM and the
hard drives and your optical drives and that's helpful for when you're trying to
troubleshoot something that's going on or something that's not working properly
and so when you go into your BIOS to configure you want to change things
around that are gonna be set properly for you you can set make settings
improper so you can do incorrect settings and they can have an adverse
effect on your on your equipment so you want to be careful about when you're
making changes and updating things maybe starting doing overclocking or something
you know make sure that you have proper cooling and things like that so just
know what you're doing before you change settings on your BIOS a consultant
manufacturer manual and just make sure that you know what you're doing before
you do that now here's another example of a BIOS setting here down in the
bottom right hand corner and there's some security on the BIOS that includes
a feature to protect the BIOS settings common security features you can have a
BIOS password you can do drive encryption you can put LoJack software
on there I do a trusted platform module and you can also do secure boot back you
know 10-15 years ago with the BIOS passwords you could just open up the
hard or open up the case change a jumper and reset the password on the BIOS and
then you were just you could bypass the password that way and that easily so
we've come up with some different things now that you either do Drive Encryption
or do LoJack that can track the the computer when it's turned on or do
trusted platform module and we're not going to discuss that in this video but
those can be discussed in another another time or you can ask your
instructor about that in your course now the BIOS hardware diagnostic and
monitoring is also you can look at the temperature there's some other
monitoring that the some BIOS is provide temperature fan speeds clock speeds bus
speeds intrusion detection some server in fact
some servers that I that I've used in the past if the case had been opened up
the BIOS will will give you a warning and say you know previous there was in a
previous attempt or a previous time the case was open on this so it lets you
know that somebody was inside that hardware which is a nice feature
now the UEFI easy mode on newer computers it is replacing the BIOS and
it's UEFI firmware and that does provide more security features and it has some
on new features that I'm BIOS had some shortcomings on it so the ufi UEFI does
change that it's got a new GUI or graphical user interface it provides
some better information it gives you an overview of basic system information and
then when you go into advanced mode that gets you into more of the involved
features like AI Tweaker or monitoring and booting maybe overclocking and with
that I would again just caution you to make sure you understand what you're
doing before you make changes okay so this was part two of the chapter yeah
this was part 2 of chapter 3 on computer assembly and we looked at the BIOS and
the UEFI configuration I hope this video was helpful and I hope you have a great
day