Troubleshooting Example
Follow through this troubleshooting example to gain a better understanding of the details involved in
the troubleshooting process.
Problem: You get a call saying that a computer will not boot.
Step 1.
Gather data from the customer.
When you get to the office, you confirm that the computer has not booted. So you
ask the customer the following:
Has it ever worked?
When was the last time it worked?
Have any changes been done to the system?
Has any maintenance been done on the system?
Are there any lights on or is the fan running?
If lights are on or the fans are on, it is most likely not a power problem.
Steps 2 and 3.
Verify the obvious issues and try quick solutions first.
To check the obvious first, you decide to make sure that the computer is turned on
and is plugged in. You make sure that you do have power from the AC outlet.
Make sure that the AC outlet is not connected to an on-off switch on the wall with
the switch off. If the computer is connected to a surge protector, make sure that the
surge protector is on. Also check for any damaged power cables. If any item has
been changed or if maintenance has been recently done, check to see what was
done and verify that the work was done properly.
Step 4.
Gather data from the computer.
Make sure that there are no lights and the fans are not running. If lights are on or
the fans are on, it is most likely not a power problem. If the computer does not
turn on, there is not much more data that you can gather from the computer itself.
Step 5.
Evaluate the problem and implement the solution.
Chapter 4: Basics of Preventive Maintenance and Troubleshooting
59
Try the following to evaluate and isolate the problem:
■
Verify that the AC outlet is supplying the correct power.
■
Make sure that the power connections are properly connected to the motherboard.
■
Make sure all other cables are connected properly.
■
Make sure the processor and RAM are installed properly.
After checking the easy items, you may have to dig deeper because you suspect a faulty
component. Faulty components that would cause a system not to boot and not to have any
lights or fans include the following:
■
Processor
■
Motherboard
■
Power supply
■
Power cord
To figure out which item is faulty, you will need to swap each of these items one by one
until you find the faulty component. You can also test each component in a known-good
system to see whether the component is working or faulty.
Step 6.
Close with the customer.
After the problem has been solved, close with the customer to show that the computer is
fixed and is working properly. Also verify with the customer that no other problems exist
with the system. You also need to make sure that you document the steps that you took in
identifying the problem and implementing the solution.
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