Your Computer Won't Start :
It's a dreadful way to start a day - you
press the power button on your computer and nothing happens.
Do not fear because all may not be lost! Follow these simple
steps to determine why your computer won't turn on.
Note: It is very important to troubleshoot
any issue beginning with the most likely and easily testable
problem so be sure to follow these steps in order.
Time Required: Anywhere from 10 minutes to
a few hours or more depending on why the computer won't turn
silly as it may sound, the number one reason why a computer
won't turn on is because it wasn't turned on! Before starting
a sometimes time consuming troubleshooting process, make sure
you've turned on every power switch and power button associated
with your computer:
Power button/switch on the
front of the computer's case.
Power button/switch on the
front and/or back of the monitor.
Power switch on the power supply
on the back of the computer.
on the power strip or surge protector (if you have one).
that the power supply voltage switch is correctly set. If
the input voltage for the power supply does not match the
correct setting for your country, your computer may not power
for loose computer and monitor power cable connections. A
loose or unplugged power cable is one of the top reasons why
a computer doesn't turn on.
a "lamp test" to verify power is being provided.
Your computer isn't going to turn on if it's not getting power
so you need to make sure that the power source is working
damaged power supply could be preventing the computer from
being properly powered.
Do a quick test
of the power supply by holding your hand behind the power
supply fan located at the rear of the case. If the power supply
is working, you should feel air from within the case blowing
against your hand. If not, you may need to replace the power
Is the power light on the front of the computer's case on? If you've turned
the power switch on but the light is off, this is another
good indication that the power supply is the cause of this
time, internal components and the cables that connect them
can wiggle loose which can often times
result in a computer unable to power on. Try reseating the
following and then try to power on the computer again:
Reseat the internal cables
Reseat the memory modules
Reseat the video card
Reseat other expansion cards
the CPU may also be necessary but should only be attempted
if the reseating of all other components is not successful.
This is due to the fact that this process is a little more
involved and can run a small risk of damage to the CPU. This
isn't a big concern if you're careful, so don't worry!
for causes of electrical shorts in the computer case. This
is often the cause of the problem when the computer powers
on for a second or two but then powers off completely.
monitors have a small light next to the power button that
can change between various colors. If the screen is blank,
this light is your main source of information about the monitor.
If this light is
not on at all, double-check the power switch and connections
(Steps 1, 2 and 3) and also make sure the monitor cable is
securely plugged in to the video card port on the back of
the computer case. If the light is still off, replace the
monitor. If it comes back on, try starting your computer again
- a loose or unplugged monitor cable may have been the issue
10. An amber or
yellow power light simply means that the monitor is not receiving
any information from the computer. In and of itself, this
doesn't tell us much.
11. On the other
hand, if the light is amber or yellow, the computer power
light is on, and the hard drive is active (making familiar
sounds and the hard drive activity light on the computer case
is blinking), the computer is probably starting normally but
the video card is not sending information to the monitor.
Replace the video card.
Beep codes (see
Step 11) usually sound when a video card has malfunctioned
but this is not always the case.
Is your computer making a beeping sound?
Sometimes a computer will turn on just enough to play a series
of beeps from the speakers.
These beep codes play in particular sequences
and represent a specific problem that your computer is having.
Troubleshoot the beep code to figure out what it's
saying and then service the computer as necessary.