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On today’s Tech, No Babel: Troubleshooting Techniques: Short-leash it
Do you suspect that the problem is either a piece of gear or a cable, but you’re not sure which? Try the short-leash test.
When you have a source, a cable, and a destination, and the signal isn’t getting all the way from the source to the destination, there are three possible points of failure: the source, the cable, and the destination. All things being equal, the failure will tend to be in the cable. It will also tend to be on one end or the other.
So, to test to see which it is, try the short leash test. Basically, take a short, known-good cable and connect the two ends of the chain, bypassing the current cabling. If its starts working, you know it’s a cabling problem and you can address it. If it doesn’t, you know it’s either the source or destination and you can troubleshoot further.
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