Closely related to the strategy of dividing a system into sections, this is actually a design and fabrication technique useful for new circuits, machines, or systems. It’s always easier begin the design and construction process in little steps, leading to larger and larger steps, rather than to build the whole thing at once and try to troubleshoot it as a whole. Continue reading »
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In a system with multiple sections or stages, carefully measure the variables going in and out of each stage until you find a stage where things don’t look right.
Example 1: A radio is not working (producing no sound at the speaker))
What to do: Divide the circuitry into stages: tuning stage, mixing stages, amplifier stage, all the way through to the speaker(s). Measure signals at test points between these stages and tell whether or not a stage is working properly. Continue reading »
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If a system is composed of several parallel or redundant components which can be removed without crippling the whole system, start removing these components (one at a time) and see if things start to work again.
Example 1: A “star” topology communications network between several computers has failed. None of the computers are able to communicate with each other.
What to do: Try unplugging the computers, one at a time from the network, and see if the network starts working again after one of them is unplugged. If it does, then that last unplugged computer may be the one at fault (it may have been “jamming” the network by constantly outputting data or noise).
Example 2: A household fuse keeps blowing (or the breaker keeps tripping open) after a short amount of time.
What to do: Unplug appliances from that circuit until the fuse or breaker quits interrupting the circuit. If you can eliminate the problem by unplugging a single appliance, then that appliance might be defective. If you find that unplugging almost any appliance solves the problem, then the circuit may simply be overloaded by too many appliances, neither of them defective.
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In a system with identical or parallel subsystems, swap components between those subsystems and see whether or not the problem moves with the swapped component. If it does, you’ve just swapped the faulty component; if it doesn’t, keep searching!
This is a powerful troubleshooting method, because it gives you both a positive and a negative indication of the swapped component’s fault: when the bad part is exchanged between identical systems, the formerly broken subsystem will start working again and the formerly good subsystem will fail. Continue reading »
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Basic Microsoft Internet Explorer troubleshooting.
This document was created as a location to find basic steps to perform when attempting to troubleshoot problems in Microsoft Internet Explorer. Before following the recommendations in solutions, make sure you have reviewed each of the issues listed on our Internet Explorer page to make sure they do not apply to your issue.
Solutions:
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A year ago, I wrote about the Jing Project, an innovative and easy-to-use screenshot- and screen movie-sharing program. Over…br clear=both style=clear: both;/
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Derman Enterprises has released Sync’Em 1.20, an update to their “multi-sync hub” software for Mac OS X. A free update for…br clear=both style=clear: both;/
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Red Giant Software on Monday announced the release of Magic Bullet Looks, a new color correction tool designed to work with…br clear=both style=clear: both;/
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iPod accessories are pretty common these days, so it’s hard to stick out among the throng–especially when you’re talking…br clear=both style=clear: both;/
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During Expo week, Derik DeLong wrote about TechRestore and the Delorean time machine adorning its show floor booth, before…br clear=both style=clear: both;/
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