Time Warner Cable (NYSE:TWC) has released the latest version of its My TWC App (4.0). It's designed to let customers diagnose and troubleshoot equipment issues, get service alerts in their area, and view real-time account information via phone or tablet.New troubleshooting tools let customers select a symptom that describes the issue with their video, Internet or phone service, and the app will determine a possible solution, including the option to reboot or reauthorize equipment to resolve the issue. By tapping on the Reboot button, a reboot "box hit" is sent to the device.Since first launched in December 2011, more than 1.2 million customers have downloaded the app.