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To understand the basics of troubleshooting, let’s start with a joke which explains all the basic principles of IT troubleshooting. Consider that you have a car with a manager, an engineer and an IT technician all in the vehicle. The vehicle travels down a hill and the brakes fail. The vehicle travels at speed off the road and almost falls off a cliff.
There are many different ways to troubleshoot computer problems. One may work better in some cases; others may work better in other cases. Generally speaking, when a problem occurs, there is generally something that caused it.
Webinar Introduction
Introduction
Types of Circuits
Open Circuit
Closed Circuit
Shorted Circuit
Series Circuit
Parallel Circuit
Basic Multimeter Measurements
Water/Electricity Analogy
DC Voltage
AC Voltage
Resistance (Ohms)
General Rules for Solenoid Resistance
Testing Resistance on a Solenoid
Testing Resistance at the Controller
Continuity
Amperage
Using a Clamp Meter to Test Solenoid Amperage
Using a Multimeter to Test for Amperage While Operating Stations
The CompTIA Troubleshooting model has six different steps. These are: identify the problem; establish a theory or probable cause; test the theory; establish a plan of action and implement; verify full system functionality; document findings, actions and outcomes.
The first step is to identify the problem. Generally, you are attending a user’s computer because they have reported something is wrong. This will normally be because they are not able to do something and it has stopped them from working effectively; however, it may not be the source of the problem. The problem could be anywhere, such as software on the computer, software on the network or internet, or perhaps the user is just not doing something the right way.