We recently mentioned do-it-yourself cable testers. Greg Muir of Wolfram Engineering says that if you need a cable tester with a variety of connector interfaces but don’t have “DIY time,” the Pyle ...
YouTube channel Audio Science Review compares Kimber's boutique KS 1036 interconnects with a battered Amazon Basics cable that host Amir says he's used for years without issue.
Microcontroller-based circuits for testing cables, sometimes in conjunction with a PC, are easy to use and very flexible. For the hobbyist, however, the complication of such devices is not justified.