"My Computer Will Not Turn On" - Troubleshooting PC Power Supply | Computers and Coffee
Summary
TLDRBrad from ibuypower presents a beginner-friendly troubleshooting guide for PCs that won't power on. The video advises viewers to follow the guide in full and seek technical support if needed. It covers checking power connections, ensuring the power supply is on, and verifying major power cables like the 24-pin connector and power button header. A key step is 'jumping' the power button to test if the issue is with the button or switch. If the PC still doesn't power on, the guide suggests 'jumping' the power supply to determine if it's faulty. The video concludes with advice on seeking further assistance for unresolved issues.
Takeaways
- 🔌 Always ensure your PC is completely turned off and unplugged before working inside it.
- 👀 Watch the entire video guide before starting to avoid skipping essential steps.
- 🔍 Check the power cord, power supply switch, and power strip/outlets for proper connections and functionality.
- 🔩 Inspect the 24-pin power connector for proper seating and no gaps between the connector and the motherboard port.
- 🔄 Verify the power button header and ensure it's securely connected and not loose or damaged.
- 🔌 Perform a power button header jump using a metal object to simulate the power button press if necessary.
- ⚡ Jump the power supply by bridging specific pins with a paperclip to test if it's functioning correctly.
- 🛠️ Unplug peripheral devices and cables before jumping the power supply to isolate the issue.
- 🔬 If the power supply test shows no activity, it's likely the power supply is the issue.
- 💻 If the PC powers on after jumping the power supply, plug in components one by one to identify the problematic part.
Q & A
What is the purpose of this video guide?
-The purpose of the video is to provide a beginner-level troubleshooting guide for when a PC is not powering on at all.
What are the three important steps that a PC goes through during every power-on cycle?
-The three steps are: Power (the PC receives power from the power supply, indicated by LEDs or fans), Post (the motherboard checks the attached hardware, usually showing a logo on the display), and Boot (the operating system starts, leading to the login screen or desktop).
What should you do before starting to troubleshoot your PC?
-Before troubleshooting, you should ensure the PC is completely turned off and unplugged. It’s also important to watch the guide in its entirety and follow each step carefully.
What tools should you prepare before following this troubleshooting guide?
-You should have a few Phillips head screwdrivers and optionally a tool to cut zip ties and a paper clip.
What is the first thing to check if the PC does not power on?
-First, ensure that the power cord is securely plugged into the PC and the power supply switch is set to 'on.' Also, verify that the power strip and outlets are working by testing them with another device.
What should you do if the PC is still not powering on after checking the external connections?
-You should open the PC and check the major power cables, especially the 24-pin power cable on the motherboard, and ensure it is securely plugged in. Also, check the power button cable and its connection to the motherboard.
How do you check if the power button cable is properly connected?
-Locate the power button cable on the lower right corner of the motherboard (usually labeled as 'power SW'). Check if it’s securely plugged into the correct pins, and ensure none of the other cables, like those for hard drive or power LEDs, are loose.
What is the purpose of jumping the power button header, and how do you do it?
-Jumping the power button header is used to determine if the power button or cable is faulty. To do this, remove the power button plug, then use a metal object like a screwdriver to bridge the two pins where the power button connects while the PC is plugged in.
How can you test whether the power supply unit (PSU) is functional?
-You can test the PSU by jumping the 24-pin power cable using a paper clip to connect specific pins (green and black if color-coded). After connecting the paper clip, plug the machine back in and turn it on. If the PSU’s fan runs, it’s likely working.
What should you do if jumping the power supply does not result in any activity?
-If there is no activity after jumping the power supply, it’s likely that the power supply is dead and needs to be replaced.
What can you do if your PC powers on after jumping the power supply but stops when a certain component is plugged in?
-If the PC stops powering on after plugging in a specific component, that component or its connection may be faulty, which can help diagnose the problem further.
Outlines
🛠️ Troubleshooting PC Power Issues
Brad from ibuypower presents a beginner-level guide to troubleshoot a PC that is not powering on. The video emphasizes the importance of following the guide in full before starting and ensuring the PC is unplugged during internal checks. It outlines the three key steps a PC goes through during a power-on cycle: receiving power, POST (Power On Self Test), and booting up to the login screen or desktop. The guide focuses on a no power scenario and suggests preparing tools like screwdrivers and a paper clip. It advises checking the power cord, power supply switch, and power strip before opening the PC. Inside the PC, it instructs to check major power connectors like the 24-pin power cable, power button header, and other cables for hard drives and LEDs. The guide also includes a method to jump the power button header and a step to test the power supply by bridging specific pins with a paperclip, which helps determine if the power supply is faulty.
🔌 Testing Power Supply and Further Diagnosing
The second paragraph continues the troubleshooting process by focusing on testing the power supply unit (PSU). It describes how to use a paperclip to bridge specific pins on the 24-pin power cable to check if the PSU is functional. If the PSU fan turns on and there's activity from other components, it suggests that the PSU is likely not the issue. If there's no activity, the PSU might be dead. The guide then advises plugging in cables one by one to identify if a specific component is causing the power issue. If the PC still doesn't power on after these steps, it indicates a potential hardware issue that may require advanced troubleshooting or support. The video concludes by inviting viewers to share comments or concerns and thanks them for watching.
Mindmap
Keywords
💡Troubleshooting
💡PC Power-On Cycle
💡Power Supply
💡POST (Power On Self Test)
💡Motherboard
💡Power Button Header
💡Cables and Connectors
💡Jumping the Power Supply
💡Hardware Issue
💡Technical Support
Highlights
Brad from ibuypower presents a troubleshooting guide for PCs that won't power on.
The guide is beginner-friendly and should be watched in full before starting.
Ensure the PC is off and unplugged during troubleshooting.
Technical support is available for those who get stuck or feel uncomfortable.
Understanding the power-on cycle involves three key steps: power, post, and boot.
Check the power cord, power supply switch, and power strip/outlets for functionality.
The 24-pin power cable should be securely connected to the motherboard.
Inspect the power button header on the motherboard for proper connection.
The power button cable may be plugged in upside down, so check orientation.
Other cables for hard drive LEDs and the reset switch should be checked for correct polarity.
Jumping the power button header can simulate the power button press.
Unplug the PC and remove major power cables before jumping the power supply.
Use a paperclip to bridge specific pins on the 24-pin power cable to test the PSU.
If the PSU fan turns on, the power supply is likely not the issue.
Plug in cables one by one after testing the PSU to identify a problematic component.
If the PC still won't power on, there may be an underlying hardware issue.
The guide concludes with a prompt to seek advanced support if the issue persists.
Transcripts
[Music]
everyone this is Brad from ibuypower
today we'll be doing a quick
troubleshooting guide for when your PC
is not powering on at all this is a
beginner level guide so it's designed to
be accessible for most users as with all
guides we recommend that you watch this
video through in its entirety before
starting no matter how confident you are
please do not skip a single step unless
the guide tells you to all steps here
are included deliberately and skipping
steps can result in the guide painting
ineffective unless instructed otherwise
always make sure your PC is completely
turn off and unplugged while working
inside of it if you get stuck are feel
uncomfortable at any point feel free to
reach out directly to our technical
support for assistance either via email
phone or a live chat first let's make
sure you're in the right place on every
power-on cycle the PC will go through
three important steps power the PC is
receiving power from the power supply
usually some LEDs will light up at the
fans of smooth post short for power on
self test the PCs motherboard will
initialize and check all attached
Hardware your display will activate
usually showing a company logo post is
required to access the system's BIOS
boot if your PC has an operating system
like Windows it has successfully booted
once you see your login screen or
desktop
this guide only covers a no power
scenario so for no post or no boot refer
to their respective guides for this
guide you should prepare the following
tools a few Phillips head screwdrivers
and optionally something to cut zip ties
and a paper clip make sure your hands
are clean and dry before touching any
components and never touch any
electrical contacts under any
circumstance first we will check some of
the easier parts before actually opening
up the PC make sure your power cord is
securely plugged into the PC and your
power supplies switch is set to on which
is the side of the line make sure your
power strip and outlets are working just
plug another device into them and see
about works you will open up the PC and
check some of the major cables that
supply power in most cases you won't
need to access the rear cable management
for this step there are three major
power connectors in your system will be
focused on the large 24-pin power cable
which is usually located on the upper
right edge of the motherboard most power
supply plugs have a clip that you will
need to squeeze in order to pull them
out make sure the 24-pin connector seems
properly clipped to its port on the
board then there is no gap between the
plastic of the connector and the port if
you do need to replug this connector
just keep in mind that it is very rigid
and requires more force than most normal
PC connectors to plug in you may
encounter a lot of resistance both
plugging in and removing
if the 24-pin seems seated correctly the
next cable to check is the header for
the cases power button if this cable
gets disconnected or broken the computer
will not respond different models of
motherboard can ferry but for the most
part the power button cable is plugged
into a set of pins located on the lower
right corner of the motherboard it's a
small plastic connector that usually
says something like power SW on it but
it's sometimes plugged in upside down so
you won't be able to read it once you
locate those plugs check if any of them
are loose or dangling our cable connects
two pins three and four along the top
row you notice others of these cables
they are for hard drive and power
indicator LEDs as well as the reset
switch button cables can be plugged in
either direction but the LED ones have
polarity so you must plug them in with
the plus facing left the HDD led plug
may not have the polarity indicated so
look for an arrow
molded into the plastic that indicates
the plus sign if your PC is still not
powering on the last thing to try is to
jump the power button header you will
need to locate the power button header
pins from earlier remove the plug that
is there to expose the pins now while
the PC is plugged in and power switch is
on use a metal object like the end of a
screwdriver to bridge these two pins
together this performs the same action
as pressing the power button in case the
cable or the switch itself is broken
the last step in this guide is to jump
the power supply this may be an
intimidating step for some folks but it
will let you know of your power supply
is dead before attempting this procedure
again make sure your power supply is
often unplugged
unplug as many of the PCs main power
cables as you have easy access to this
includes the video cards power cables
the athan CPU power cable which may be
difficult to reach so if you can't
access it that's fine but if you can try
to remove it and any molex or SATA power
connected to drives and accessories as a
tip take a photo of your cable
management and each connector you unplug
to remember where it goes once you have
all your items unplugged
grab your 24-pin power cable and use a
paperclip to bridge these two pins if
your PSU has colored wiring it will be a
green and a black wire if not refer to
this diagram for the location of the
pins after connecting the paperclip plug
the machine in and turn it back on you
should be able to hear your power
supplies fan turn on and if you left
some hardware plugged in you may see
some activity from the PC
this means your PSU is likely not the
source of the problem if you get no
discernible activity then a dead power
supply is the likely culprit if you got
activity from jumping the power supply
turn the PC back off then start plugging
in cables one at a time and turning the
PC back on until either you have all of
them plugged back in or suddenly you
notice it stops turning on after
plugging in a specific component
whatever that plug is may help in
diagnosing the problem if at this point
you're still unable to power on your PC
then you likely have some manner of
hardware issue this would be the time to
proceed to some advanced
our support stuff well that concludes
our guide hopefully your issue was
resolved somewhere along the way if you
have comments or concerns feel free to
leave them as a comment on this video or
hit us up on social media thank you
you
[Music]
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