Try the following steps to see if they help: 1. Ensure the projector is properly aligned and that the lens is facing the screen directly. 2. Go to Settings > Lens > Reset keystone correction data 3. If the above steps don’t resolve the issue, manually adjust the keystone correction by going to Settings > Lens > Keystone Correction > Turn Off Auto Keystone Correction > 4-Corner Correction.

1. Try another Wi-Fi network and update the firmware. Go to Settings > System Update > Search for Update > Internet/USB 2. Check if your time zone is accurate via Settings > Device Preferences > Date & Time 3. Clear data via Settings > App Setting > View all apps > (App Name) > Clear Cache& Clear data. 4. Reset the HY320NTV via Settings > Device Preferences > Reset Projector

1. Use a different HDMI cable. 2. Connect your HY320NTV with another device with your HDMI cable. 3. Disconnect from your HY320NTV and try connecting your device with your TV via HDMI. 4. Adjust the HDMI output resolution/Hz of the connected device to match your projector.

1. Check if the power indicator is on when the power cabled is plugged in 2. Try another workable power cable 3. Update the projector via USB drive

Try the following steps to see if they help: 1. Adjust Volume: Press the Volume Up/Down button on the remote control to make sure the volume isn’t muted or too low. 2. Connect to a Bluetooth Speaker: Go to Settings > Bluetooth Settings > Available Devices to connect your projector to an external Bluetooth speaker. 3. Check Video Format: If the video format includes Dolby sound, try playing a standard audio format to test if the issue is format-related. 4. Factory Reset: Perform a factory reset by navigating to Settings > Other Settings > Factory Reset to restore default audio settings. 5. Inspect Speaker Connection: If your projector has a built-in speaker, disassemble the device (with the projector powered off) to check if the speaker cable is securely connected. Note: Ensure the projector is turned off and unplugged while inspecting internal components to avoid any risk of injury.

Try the following steps to see if they help: 1. Ensure the projector is properly aligned and that the lens is facing the screen directly. 2. Navigate to Settings > Projection settings > Keystone Correction > Initial angle correction. 3. If the above steps don’t resolve the issue, manually adjust the keystone correction by going to Settings > Projection settings > Keystone Correction > Turn Off Auto Keystone Correction > Manual Down keystonecorrection

1. Try another Wi-Fi network and update the firmware. Go to Settings > About devices > Online upgrade 2. Check if your time zone is accurate via Settings > Date And Time Setting> Time Zone Selection 3. Clear data via Settings > My Apps > (App Name) > Clear Cache. 4. Reset the projector via Settings > Other Settings > Factory Reset Settings

1. Place the projector and your router within 16 ft / 5 m of each other. Test if other devices can connect to Wi-Fi. 2. Check if your time zone is accurate via Settings > Date and time Setting 3. Try a different Wi-Fi network or connect to your phone's hotspot. 4. Try your router's 2.4GHz and 5GHz settings. 5. Reset the projector by going to Settings > Other Settings > Restore factory settings.

1. Adjust the HDMI output resolution and refresh rate of the connected device. 2. Press the OK button on the remote control to confirm whether you can enter the screen projection interface and then try connecting the HDMI cable and external devices. 3. Try disconnecting and connecting the HDMI cable or using a different HDMI cable to see if this resolves the issue. 4. Connect the projector to another device using the same HDMI cable to determine if the issue is with the projector or the device. 5. If the issue persists, disconnect the projector and connect the device to a TV via HDMI to determine if the issue is with the device or the projector.