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- Okay. Now onto Video
Troubleshooting part 2.

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Now, we'll talk about some of the symptoms

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that you might see in the field.

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And some of these are listed
in the CompTIA A+ objectives

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and we'll talk about some of
the solutions to those issues.

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First is VGA mode.

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What if your computer
boots into VGA, 640 x 480?

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Well, it could be that you don't notice,

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but it's actually going
into safe mode or safe boot.

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So you check that first.

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Secondly, and normally
you'll see safe mode

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in the corner to screen,

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and, you know, you can
check that pretty easily.

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But secondly, it could be
that the driver has failed

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or it's not compatible
with the video card.

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So, you wanna check the driver as well

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and either roll it back if a
new driver was just installed

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or update the driver and see
if that fixes the problem.

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Once you get that nice crisp screen

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that you can fit lots of icons on,

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then you know you have
that high resolution

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working properly.

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In addition, you might just have to check

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the resolution setting.

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And we talked about that, you know.

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You might have your monitor here

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and it might be set to
800 x 600, you know,

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it might be set to 640
x 480 or 1024 x 768,

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all of these old school, 4
x 3 aspect ratio resolutions

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all of these old school, 4
x 3 aspect ratio resolutions

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which will leave a black area

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on the left and right
sides of the screens,

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that is basically, you know,
what you wanna look for.

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You wanna check that resolution,

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you wanna check that driver.

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Also dead pixels and artifacts.

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You wanna watch out for those.

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They can be really annoying.

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And, you know, especially if
you have a brand new monitor.

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Now, if you see one on
a brand new monitor,

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you really should box
it up and send it back

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and get a replacement right away.

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You shouldn't have to mess with that.

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But if the monitor has
been around for a while,

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you want to do that power
cycle that we talked about

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and, you know, let it sit,

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even let it sit overnight

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and see if that fixes the problem,

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then plug it back in, turn it back on.

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See if that fixes the problem

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after you've let it sit overnight.

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And we mentioned the third
party software as well.

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There's a lot of third party programs

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that can actually fix some
pixels if it's a software issue.

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If it's a hardware issue

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or there's any damage to the display

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and your power cycling doesn't work,

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then you want to return that monitor.

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'Cause it could get worse.

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If the color patterns are incorrect,

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well, you wanna watch
out for that as well.

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You might have older computers

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You might have older computers

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that are set to a low color depth,

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like, 8 bit color depth,

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which is rare, but you might see that.

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And even the 16 bit or 24 bit
settings might not be enough

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for the person's application in question.

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So generally, it runs at 32 bit by default

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on most video cards within Windows.

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But you do wanna check that.

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And we showed that also.

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Again, just to show it again,

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the screen resolution, advanced settings

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and go to monitor and colors.

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And you might also check that
in the third party software.

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if you have third party software

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from your video card manufacturer,

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you might do that as well.

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An overheat shut down.

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Now, the display could shut down

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and the display will go amber.

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This is a tough one to troubleshoot.

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But if you open the system

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and you feel the video card

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and it's really hot,

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like, it's burns your finger almost,

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then you know, you have
an idea there that,

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Ooh, it overheated.

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And generally the cause for
that is a clogged up computer.

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Either the fans are really
dirty and have either failed

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and it could be the fan on the video card

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or an exhaust fan on the system,

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or there's just too much stuff in there

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and too many cables and
it needs to be cleaned up.

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Meaning tied up, tie up the
cables, do cable management

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or you might need a liquid cooling system

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or a more powerful video card.

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If there's no image on the screen at all,

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you want check the power,

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you wanna check the power
button, see if it's on first.

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And then you wanna
check those connections.

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You know, your video
connection to the computer,

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your power connection from
the monitor to the AC outlet.

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You know, if the light is amber,

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that means it is plugged in,
but it's not receiving signal.

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If it's blue, it's receiving signal.

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And if you still see
nothing on the screen,

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if it's blue or green
or a color like that,

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if you still don't see
anything on the screen,

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then you're gonna wanna go
into more troubleshooting.

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Maybe try safe mode, maybe
try rolling back the driver,

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maybe try a different port.

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Make sure it's connected
to the right port.

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Sometimes if it's amber

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and you don't see anything on the screen,

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you know you're not
getting that data signal

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and it could be because
the resolution is incorrect

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and it could be because
the resolution is incorrect

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or the display was disabled,

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the display adapter was disabled.

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So there's a lot of
possibilities with that.

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You have to remember that if it's amber,

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it's not getting any data
signal from the computer.

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So there could be a lot
of possibilities for that

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on the hardware and the software side.

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Next is dim image.

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Well, then you're gonna
check the brightness

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and you check that on
the OSD on the screen.

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And this is really common on laptops.

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You know, people reduce the brightness

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for a variety of reasons

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and they might forget to increase it

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once they're in a darker area.

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So check that on the
function keys on the laptop

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and the OSD on a monitor for a desktop.

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and the OSD on a monitor for a desktop.

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Flickering image could be an issue.

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That means, okay, the
resolution's not right

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or possibly the driver's
not working properly.

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This was more of a problem with CRTs.

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You don't see it that often
on LCDs, but it is possible.

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So you wanna check that
driver, check the connections,

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check the resolution.

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Distorted image.

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This could be a problem with the GPU.

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If the GPU overheats,

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it might not just shut
down and display nothing

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and the monitor goes amber,

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it might actually distort the
image or a part of the image.

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Also, if the display is damaged,

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you could get a distorted image
in a portion of the display.

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It's a possibility as well.

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Oversized image and icons.

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This is another one in
the compTIA objectives.

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If this happens, chances are
the resolution is too high.

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Oh, excuse me, the resolution is too low.

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Do that again.

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If this happens, the
resolution is probably too low

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or the DPI setting has been changed.

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If we go to screen resolution here,

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go back to display,

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we can set a custom text size,

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we can set a custom text size,

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we can also change it the
entire screen size for text.

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we can also change it the
entire screen size for text.

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You know, so, it could be that it's set

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to one different one like this.

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You know, if it's larger like this,

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well, okay, we can modify that here.

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That's for the text size and window size.

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So that's in,

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that's separate from the resolution itself

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where if we modify the size here,

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everything gets bigger also.

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So, different settings there,
but kind of the same thing.

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So those are a couple things to watch for

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for oversize images and icons.

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And of course, if it is
booting into VGA mode,

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you're gonna get that as well.

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So you wanna, you know, check that,

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check that driver as well,
if that's the problem.

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But generally that's a resolution issue.

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Next is the distorted
geometry and burn-in.

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And again, these types of
things are generally CRT.

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So just in case you get a
question on cathode ray tube.

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Because CRT is in the
objectives acronym list

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but it's not in the actual objectives.

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And actually, I do know
some people that use them,

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you know, I do know some people

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that use CRTs in labs.

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that use CRTs in labs.

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You know, science labs
and things like that,

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where they've just been using
the same monitor forever

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because it works and they
don't wanna mess with it.

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They don't even want
to disconnect anything

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from the computer for fear of it failing.

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So, you might see that with an old CRT.

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And if you see that trapezoidal shape,

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you can modify that with
the buttons on the screen

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that are on the edge of the display

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or within the onscreen
display in the menu,

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depends on the age of the CRT.

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And the burn-in, well,
that's usually an issue

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that can't really be resolved.

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You can try power cycling it

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and you can try running a couple programs

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to help re-stimulate the pixels.

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But quite often it doesn't work

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and burn-in is kind of permanent on those.

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But that's just in case
you get a question on CRT,

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which is unlikely.

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It's also unlikely that
you'll encounter those.

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But you know, that all depends.

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Some places they need all
the space they can get.

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And CRTs are so deep that, you know,

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you have to have a flat panel.

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Other places don't have
the money to upgrade.

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Other labs just keep what they have

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and, you know, whatever,
they just go with it.

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So, just in case you happen to see

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a distorted geometry or burn-in,

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you know what to do with that.

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So, that's some more troubleshooting,

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some symptoms that you wanna look out for

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and the potential solutions for those.

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But always keep your mind open.

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You never know there might be

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additional solutions out there.

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It all depends.

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There's a lot of possibilities

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00:10:01,320 --> 00:10:03,363
when it comes to the video subsystem.

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And so, that's it for this
sub-lesson and for the lesson.

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And you'll see at the next one.