HDR is a technology that enriches the picture on your TV with a wider color gamut, higher color volume, contrast ratio, and more precise color accuracy.
To find out if you need a firmware update, first check what firmware version is installed on your AirPods. On your iPhone, you need to open Settings and go to Bluetooth. On a Mac, the steps will be different depending on the macOS installed.
If you need to turn on Roku TV without a remote, you have two main options: using the physical buttons on the case and the official Roku app for smartphones.
To fix Windows activation error code 0xC004F213 you need to log in to your Microsoft account, try to enter the license key manually, use PowerShell to find out the key written into the motherboard or use the built-in activation error troubleshooting tool.