A battery icon with a warning on it appears in the system tray to indicate that a slow charger is connected, and the battery is discharging. The Slow charger notification might appear too. The MHL Alternate Mode lets you project video and play audio on an external display that supports MHL. Note: This applies to all the error codes shown in Device Manager except error Code 28 (drivers for the device aren’t installed). These were some of the best and well-performing USB-C to DisplayPort cables to help you connect your powerful laptop to a compatible external display. And while you are at it, keep it in mind not to yank the cable out by holding the cable. Rather, grip the strain relief and gently tug at the cable. This way cables last long. Notes: USB Type-C has a new feature called Alternate Modes which allows you to use non-USB connections with the USB-C cable and connection. There's no setting to turn on—your device automatically uses the appropriate mode if it's supported. Here are the display Alternate Modes that your cable may support:

The DisplayPort Alternate Mode lets you project video and play audio on an external display that supports DisplayPort. Make sure the device or dongle is connected to the USB-C port on your PC (or phone) that supports the features of the device or dongle. For example, if you're connecting a Thunderbolt device, make sure it’s connected to the USB-C port on your PC (or phone) that supports Thunderbolt. If your Windows 10 phone is already running the latest version of Windows 10 Mobile, try to connect your device to a Windows 10 PC instead.

Make sure the device or dongle is connected to the USB-C port on your PC that supports the features of the device or dongle. For example, if you're connecting a Thunderbolt device, make sure it’s connected to the USB-C port on your PC that supports Thunderbolt.

It is also a good idea to make sure that your sound device is turned on, and that the device's volume control is not at the absolute minimum setting At the same time, if you are on a Windows system and have more than one DisplayPort-compatible monitor, you can also use the MST mode to daisy chain both the monitors. To charge faster, your PC (or phone), charger, and cable must all support the industry standards. Your charger and cable must also support the power levels your PC (or phone) requires for the faster charging. For example, if your PC requires 12V and 3A for the fastest charging, a 5V, 3A charger won’t give you the fastest charging. Your PC has a low battery, so it has temporarily limited the amount of power it can provide to the device.Make sure your PC, the external display, and the cable all support DisplayPort or MHL alternate modes. However, it has a small caveat. If you have the 12-inch Apple MacBook, you’ll get 4K-only at 30Hz. Other than that, it’s a versatile cable and works on both macOS and Windows systems. If you have a USB-C analog audio adapter connected to your PC, unplug it, then connect a USB-C digital audio adapter instead. Dust or dirt inside the USB port on your device might be preventing the charger from being inserted correctly.