Motherboard Jumpers and Connectors – CompTIA A+ 220-801: 1.2


If you were to look at your
motherboard, you would find a lot of different connections
on it. There are a lot of different
jumpers on it. Some are very obvious, like
these big connectors for a hard drive. But you have these much smaller connectors on here as well. And if you notice on the
motherboard itself, there is text right next to these little
connections that give you an idea of what these
are associated with. If you were to look at the
documentation of your motherboard, you would see that
these two connectors are for a power LED light that would
be on the case, so that you could see what the status
was of the power just by looking at the outside case
of your computer. Here’s another one for HDD. That stands for your “hard drive
status lights.” A NIC1 and a NIC2 probably refers to
the status of your network interface card. And here’s one for OH. That stands, in my particular
case on this motherboard, for overheating. If your motherboard gets too
hot, a light will come on on your computer case so that you
can visually see there’s some type of problem happening
with your computer. If we were to look at our
computer case, it has a lot of wires coming off of it that are
connected to those lights. And the wires generally are
labeled on the end so you know where to plug them in. Here’s a few wires. This one says, reset switch. So I would plug this into the
connection that I would use to reset the motherboard. There’s the HDD LED. There’s the light that I would
plug into that hard drive connection we were looking at. There’s a power LED. So I can plug this into the
place that signifies that there’s power going to
the motherboard. And once I plug them all
in, they’ll look something like this. I’ve now connected to all of
those different connections right there on the
motherboard. And they’re all now trailing
back to the case itself, so that I can now put the
motherboard inside of the case, put the case on the top
of it, and have all of those status lights on the front. The connections that you’ll need
to plug in are probably located in many places
on the motherboard. They’re probably not going
to all be in one place. So you’ll want to look at the
documentation of your motherboard to find out
exactly what you’ll be plugging in and how you’ll
be plugging into those connections. And if you plug them in the
wrong way, or you miss a pin when you’re plugging it in,
you’ll notice that you’re not getting the light, or you’re
not getting the noises you might think you’d be getting
through your speaker or through the other devices
that you’re plugging in. Back on the computer case,
you’ll have, of course, connections– like a power connection,
and a reset connection. And these particular buttons,
on these case, have a light built into them that the
motherboard will then power and send that information. So you can see at a glance,
is it powered on? You also have these connectors
for USB ports and other speaker connections. Those wires also will plug into
corresponding connections back on the motherboard. I have another video that’s
just about power supplies. But that’s an important
connection to your motherboard. There will be a 20 or a 24 pin
connection that you’ll be plugging into the motherboard
itself that’s coming right from the power supply. It’s one big connection,
as you can see here. It’s very obvious to see. And if you look at your
motherboard, and you look around at where the different
connections are, it’s pretty obvious– in this case, it’s over on
the right-hand side– where you might plug-in
the power connection. It’s one of the most obvious
ones you’ll find on your motherboard. So there’s all kinds of
different connections. Some of them are very small
fan connections. Some of them are connections
to go back to your case. And some of them are these very
large power connections that you’ll find. There are other connections on
your motherboard that are not designed to plug into a floppy
drive, a hard drive, or even connections from your
motherboard case. These are jumpers. Those are simply pins that
you’ll find on the motherboard. Sometimes it’s only
a pair of pins. Sometimes it’s more of those. And you’ll have to look at
the documentation of your motherboard to determine
where the jumpers are and what they mean. On my motherboard, I have
a jumper 13 right here. That’s simply two pins. Now these pins are
not shorted. We’ve not connected
them together. So there are two statuses for
whatever this jumper 13 is signifying. If it is un-jumpered, that has,
in this case, a certain speed for my PCI bus, if I
jumper them together, I’m lowering the speed. So just by adding a jumper
between those two pins, I can change the way my motherboard
works. If you look at the jumper–
and it has one of those jumpers that is just
halfway on. And the other side isn’t
plugged into anything. That is the same as if there
isn’t a jumper there at all. It’s simply sitting on that pin,
so that later on, you’ll have access to the jumper. You don’t have to find one,
rummaging through drawers, or borrowing it from
another device. You can simply lift that jumper
off and set it right down on top of both
of those pins. And now you have shorted
those pins together with that jumper. So before, when I had it
un-jumpered, that connection meant that my PCI bus ran
at a certain speed. When I jumper them together,
it changes the speed of the PCI bus. And you might need to do that
depending on what you’d like to plug in to certain
connections. You might have other jumpers on
your motherboard that might enable or disable sounds. There’s other jumpers that might
enable or disable the clearing of the BIOS
configuration. There’s generally a number of
different jumpers on your motherboard. So make sure you look at your
documentation to determine where those jumpers might be,
and what you can modify or change by setting different configurations of
those jumpers.

7 thoughts on “Motherboard Jumpers and Connectors – CompTIA A+ 220-801: 1.2

  1. when you're connecting a jumper can you do that while the pc is on and running?
    PS thanks for posting these videos its a great amount of help

  2. I usually don't write comments on YouTube because I  am sometime lazy to go to log in and its distraction as well and takes my time but I cant pass this helpful video without comment, like or subscribe. Very well explained, never seen any video on YouTube so helpful like this. Thanks Professor Messer, It's so much easier to understand you and very easy to follow, Best video Professor. Thank you again this was so helpful. You should make more video about building computer and after building computer, what to do in the bios to the start computer background screen, and what to do before turn on pc and set windows in, what to do if don't have enough 2.0 USB male extension on your motherboard, a lot of more. again this's very easy, really helpful, thanks

  3. Hello, I have a small issue. I cannot use the front panel connectors of my new case to my OEM motherboard. Here is the format of the pinouts:

    HDDLED+ PWRLED+
    HDDLED- PWRLED-
    PWRSW- PWRSW+
    NONE NONE
    PWRSW- NOPIN
    PWRSW- NONE

    For some reason, the negative wire of the power switch connects back into two pins below the power switch. What should I do?

    All I did was I took the old power switch and connected it to the motherboard. However, I would have to open my case every time I want to turn it on.

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