next we have some. We have some kind of serious issues. We have smoke and burning smell. Well, smoke and burning smell are both two really bad things that may we may occur with our computer. With smoke, we may be seeing issues such as power supply malfunctions,
incorrectly plug cables or cables
forced in upside down or cable shorts inside of our computer. So whenever we're dealing with electron ICS and we start seeing smoke or smelling a burning smell, we want to get those unplugged and wouldn't want to get them turned off a soon as possible so we can investigate what that ISS, but again, with smoke
we may be looking at some are bad power supply.
Our power supply. Maybe you're starting to short out may be causing some smoke or and maybe some incorrectly pub plug cables or some cable shorts. So we want to check those physical components. If we noticed that
with our burning smell, we may have a hard drive that's burning out or an optical drive this burning out, the the moving components inside of them, the gears and the moving motors may be starting to burn out, and I we may need to get them replaced as soon as possible. The actual devices rather than the motors.
We may have some incorrectly pope plug cables
or a power supply that's going bad again and may not be to the point yet where its billowing smoke. But we may have some burning smell that we need to take a look and see if we can identify what's causing that. We may have some excessive dust inside our cable, some dust or debris, or that's causing some overheating issues.
And the overheating is causing a
causing some burning smell, maybe from the different components that are getting really hot inside of our computer. And we can also may also be having some melting wires or connectors. This also goes with incorrectly plugged in connectors. This goes with some overheating issues.
Or maybe we have a fan that's running really, really fast, is getting its running really, really hot
and we're getting some. We're getting some melting components inside our computer that are causing that burning smell. We also have our blues R B s O D. More formally, are also known as our blue screen of death.
This is when you are running your computer and everything seems to be going off all right, and then also, and you just get a blue screen air message
and everything stops now are blue. Screen of death can be for many different reasons. It will probably refer to it later in some of our other child shooting modules. Could be from everything from our craft crashing applications to operating system errors. Registry problems.
We may have some bad drivers that we can try to fix or check by booting into safe mode.
We may have some we have failing. Memory modules would have, Ah, motherboard that is failing are going bad. We may have a hard disk drive that has bad sectors on it that has data written to it or a hard drive that's failing. Or it may even have a virus infection. So we see how are blue screen of death.
We'll need to really narrow down our problems when it comes down to
when we get that error. May want to check out us the stop code that we have on our blue screen of death to see if that gives us any additional information that we can research. But remember that it can. Our blue screen of death can include crashing applications. Slash operating system files have bad drivers that are installed, and we need to check those
motherboard issues, hard disk drive issues, virus infection as well.
So we talked about some of the common symptoms that we have when we're experiencing memory, hard drive, motherboard, CPU and power issues. But let's take a look at a couple of the tools that can help us to diagnose and help us to check and narrow down when we're doing our troubleshooting on these issues are first device that we have is our multi meter.
Now Our multi meter is going to allow us to test electrical readings,
but it does require some additional knowledge for you for use. Our multi meter is our device that looks like this one. It allows us to change our settings depending on what we're testing it for. If we're testing for connection between two places for checking to see if there's if a
two points complete a circuit,
if we're checking to see if there's voltage output will change our settings, depending on what we're checking for, will use our positive and negative prongs will take their covers off, obviously, so we'll be able to use their positive and negative prongs in order to test,
and we again meet a little bit of additional knowledge.
We'll need to make sure that we use this properly, and we'll need to know what readings were looking for on certain components so that we can check our components like our our video cards or our
our computer casing to make sure that it's not completing a circuit with an area that we don't want it to. Or we're checking for voltage on a certain device to make it. Sure it's actually pushing out voltage or it's and it's not a dead device. We can use our multi meter to help us find out those find out those difference things and
troubleshoot those issues and see if we can figure out where our problem is.
So next we have our power supply tester. Now, our power supply tester allows us to check the connectors on our power supply, make sure that they're receiving proper voltage and also make sure that our power supply is outputting power. Now our power supply converts alternating current A C to direct current DC
And if our power supply
isn't working properly than our computer components won't get the power they need.
our power supply connector is going to be a device that looks like this one right here. I've already gone ahead and attached it to our main motherboard connector. And our main motherboard connector wasn't questioned. Our computer wasn't booting up properly. Our computer was are. The fans were just
spinning. And now I want to see if I can determine if our problem is the actual
motherboard itself or if it's our connector here. So
I got our handy dandy power supply tester, which I had in our two toolbox, and we're going to go ahead and we're going to connect it up to our
Now, we want to be careful that we insert the connector properly. We don't wanna bend any pins because it's still a potentially good power supply connector. And then once we have it firmly in place, we're gonna go ahead and
put put power to our power supply. Now, some of our power supplies will have a button on the back that will need to push in order to test the power supply on other ones like this one will simply put in our power cable, and it will get the power rolling.
we're noticing. Here we heard an audible beep that our power supply tester
performed, and we're gonna and we get all green lights here now are green lights here are letting us know that this power supply a TTE least this connector right here is good. So if my motherboard is still having issues, if it's still not booting properly,
then we may be able to narrow that we are able to narrow that down now to our mother board itself
or the connector on the motherboard. Because we know it's not our power supply. We can hear, hear One of the symptoms that we had earlier are one of the symptoms we talked about earlier, with our fans spinning but our computer not coming on. And that's a symptom of either our connector being bad or motherboard being bad. Let's unplug this
and we'll show another example.
We need to leave. This main will leave this main connector in here for now. And we'll also check our one of our state of power connectors now we have a We have a hard drive in here. This hard drive wasn't reading properly. And I had a hunch that maybe it might be our power connector. So we're gonna check that
so we'll go ahead and we'll plug our power connector
into our device here, into our power supply reader
And now we'll get started plugging in. And now we noticed we have another set of lights over here on our opposite side. These sets of lights here are going to be for our main connector. We still have plugged in, and then we have our additional pate are, say, the power connector We have plugged in, and we now know that both of these connectors are good.
Our power supply should be good.
So we need to die. We need to go. And we need to troubleshoot other parts of our system because we've now eliminated our power supply as a potential source of problems.
So our next tool that we're gonna use to test our device to Death Star Computer is going to be a loop back plug now are looped back plug A device that looks like this, it essentially allows us to we could determine if a port is working on our computer. It's gonna cross over, are sending and receiving ports. So essentially plug this device into our computer
and our ports is going to try to send back to itself. Is gonna try to Luke
back to itself are looped back. Plugs may require some specialized software in order to test and see if they're working, But we're gonna plug these into our network interface card. We're gonna use our loop back plug to determine if our network is working. Are rather our network interface card is working and let us troubleshoot the actual hardware itself.
Now, our last device is gonna be a postcard. Post stands for power on self test. And we talked a little bit about how when we perform our power on self test, when we turn on our computer, we may hear a series of beeps. Well, these beefs may not tell us much, so a postcard allows us to read those air codes
and it will display awesome graphical output
on. And we can compare this against a postcard documentation. We can compare it against our computer documentation for our post codes and we can use these codes in order to help to determine what our issue. Maybe
so we have our computer here that is not posting.
It's not finishing post and booting. It's getting giving us some post beeps. So we have our postcard that we installed.
So are post card has an additional attachment. Which leads us to pull out this this display here so it makes it a little bit easier to see what's going on and let's go ahead. And I'm gonna remove the power from our computer
so we can take a postcard back out and take a little look at it. So this is our post card here.
Um, we it has two different weight, too different
expansion card type plugs that we can plug it into in order to test and see what's going on. And we have our number display here. Our output, and we also have a connector to our remote output that we can use.
So our computer here isn't posting.
We're getting some post beats,
so we're gonna go ahead and place our card
and we're going to reapply power to our computer
and let's see if we can get it to start up.
All right away we get some post beeps.
So let's see if we can get a code
which we said in just a moment.
s So now we get our output code on our actual
remote as well as an output code on our computer. It's on the car itself,
and we'll be able to use this code to diagnose what issue may be going on with this computer. So we look up on, we see what this what issue we may be having. And turns out, um,
I just So I just so happened to replace the memory I
in my sleep, I must of sleep. Computer worked and pulled out my memory modules and put him next to my computer, and it wasn't posting. And then this reminded me that I need to put my memory modules back in before I can actually get rolling with my computer. So that's the function of our postcode postcard. Rather
Ah, it helps us to diagnose what issues when we may be seeing when we're
trying to boot of our computer and we're getting post codes so hopefully we'll be able to use this tool in order to better troubleshoot computer issues, especially with our, especially when we're getting our post codes.
So thank you for joining us here on cyber dot i t. Today. We talked about troubleshooting some common issues with RAM CPU are motherboard and our power. We talked about a lot of the different types of common issues that we may see when we're experiencing issues with these components,
as well as some of the tools that we can use such a czar power supply tester on our post card. What you have here
in order to better diagnose what issues may be going on, and it's a better narrow down where the issue may lie. So hopefully you can use this information. You can go forward and troubleshoot your own systems or use this information to troubleshoot computers in a business environment. And we hope to see you here next time for another
exciting round of troubleshooting tools. Here on cyber, we got I t