Tuesday, January 12, 2016
The most common way that a computer "won't turn on" is when the PC actually does power on but doesn't display anything on the monitor.
You see lights on the computer case, hear fans running from inside, and may even hear sounds, but nothing at all shows up on your screen.
There
are several possible reasons why your monitor isn't displaying
information so it's very important that you step through an ordered
process like the one I've outlined here.
How To Fix a Computer That Turns On But Displays Nothing
1.Test Your Monitor
Before you begin more complicated and time consuming troubleshooting
with the rest of your computer, make sure your monitor is working
properly.
It's very possible that your computer is working fine and your monitor is your only problem.
2.Verify that your PC has fully power cycled
In other words, make sure your computer has completely reset - make sure
that it's coming on from a completely powered-off state.
Often
times a computer will appear to "not be on" when actually it's just
having problems resuming from either the Standby/Sleep or Hibernate
power saving mode in Windows.
Note: You can power off your computer completely while
in a power saving mode by holding the power button down for 3 to 5
seconds. After the power is completely off, turn on your PC and test to
see if it will boot normally.
3.Apply Thermal Paste On CPU
Heat management is important to consider when constructing or
maintaining your computer. Too much heat can spell death for your
sensitive components, and if you’re overclocking it’s even more of an
issue.
Buy a thermal paste from the market and Just apply a drop or two to the old material and let it sit for a minute while the cleaner breaks up the grease in the thermal paste.
Then, wipe it clean with a lint-free cloth. A coffee filter makes a
terrific, cheap lint-free cloth. Repeat the process until both the CPU and cooler are totally clean, and then move on.
4.Troubleshoot the cause of the beep code
A beep code will give you a very good idea of exactly where to look for the cause of your computer turning off.
If
you don't resolve the problem by troubleshooting to the specific beep
code, you can always return here and continue with the steps below.
5.Clear the CMOS
Clearing the BIOS memory on your motherboard
will return the BIOS settings to their factory default levels. A BIOS
misconfiguration could be why your PC won't startup all the way.
Important: If clearing the CMOS
does fix your problem, make sure any changes you make in BIOS are
completed one at a time so if the problem returns, you'll know which
change caused your issue.
6.Verify that the power supply voltage switch is set correctly
If the input voltage for the power supply is not correct (based on your country) then your computer may not turn on completely.
There's
a good possibility that your PC wouldn't power on at all if this switch
is wrong but an incorrect power supply voltage might also prevent your
computer from starting properly in this way too.
7.Check for causes of electrical shorts
This is often the cause of the problem when the computer powers off by
itself but certain shorts can also prevent your computer from booting
fully or showing anything on the monitor.
8.Test your power supply
Just because your computer's fans and lights are working does not mean
that the power supply is functioning properly. The PSU tends to cause
more problems than any other hardware and is often the cause of a
computer not coming on all the way.
Finally, if all else fails, you'll probably need to seek professional help from a computer repair service or from your computer manufacturer's technical support.
