Playstation 3 controllers won't connect or turn on even when connected via cable

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All of a sudden both my PS3 controllers won't light up or connect even when directly connected with a cable. I thought it might just be a dead battery but the controller wont' light up or turn on at all with different cables and power supplies. I tested the cable as well.
Can I do something to troubleshoot? It seems suspicious that both controllers would go on the fritz at the exact same time.
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Why is my PS3 saying connect the controller using a USB cable?
It's very simple. Just connect your controller to the console with a USB cable. Once the console detects the controller, it will move to the next screen, which is the software installation. Keep a pen drive loaded with the latest PS3 console software.How do you fix a dead PS3 controller?
You can also press the reset button on the back of the controller with a paperclip (hold for 10 seconds or so), plug in, then press the PS button.How to Sync your PS3 Controller for First Use on your PS3
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Brett Sayles, cottonbro, Brett Sayles, Brett Sayles