Troubleshooting Blog

To most people, equipment (of whatever kind, from a light switch, to an assembly line, to your smart phone) is just a “Black Box”…

Effective troubleshooting is 60% science, 40% art, and 50% luck. You will need to draw from your training, your experience, and your gut feeling.

Understand the correct inputs and outputs of the “black box.”

Determine which output(s) are incorrect.

Figure out which input(s) affect that output(s).

Verify that those inputs are as expected.

Analyze the path(s) from input(s) to output(s).

Check all connections.

Eliminate the devices that could not cause this output.

Eliminate the devices that could not cause this output.

Test the remaining devices.

Repair/Replace faulty device(s).

Fully test the system.