If your EZ-B IoTiny's camera is visible on the Wi-Fi network but the board itself is not responding or showing up, there could be several reasons for this issue. Here are some troubleshooting steps you can take to resolve the problem:

1. Power Cycle: Start by power cycling your EZ-B IoTiny. Turn it off, wait a few seconds, and then turn it back on. This can sometimes resolve temporary connectivity issues.

2. Check Connections: Ensure that all cables, including the camera and power connections, are securely attached to the IoTiny. A loose connection can cause intermittent issues.

3. Reset to Factory Defaults: If the IoTiny was previously connected but is no longer showing up, you might need to reset it to factory defaults. To do this, press the reset button when the IoTiny is powered. This will reset the Wi-Fi settings to AP mode, and you will need to reconnect to it as if it were a new device.

4. Wi-Fi Modes: Verify that the IoTiny is in the correct Wi-Fi mode (AP mode for direct connections or Client mode for connecting through a router). If it's in the wrong mode, it may not appear on the network as expected.

5. Network Interference: Check for any potential Wi-Fi interference. Other networks on the same channel or electronic devices can interfere with the signal.

6. Firmware Update: Ensure that your IoTiny is running the latest firmware. Firmware updates can resolve known issues and improve device performance.

7. ARC Software: Make sure you are using the latest version of the ARC software. Outdated software can sometimes lead to compatibility issues.

8. Dedicated Power Source: Ensure that the IoTiny is receiving adequate power. Insufficient power can cause the board to behave unpredictably.

9. Reconnect to Wi-Fi: If you reset the IoTiny to factory defaults, you will need to reconnect it to your Wi-Fi network. Follow the verbal setup prompts or use the ARC software to configure the Wi-Fi settings.

10. Check IP Address: If the IoTiny is in Client mode, ensure that it's getting an IP address from your router. You can usually check connected devices from your router's admin interface.

11. Firewall and Security Software: Sometimes, firewall or security software on your computer can block communication with the IoTiny. Temporarily disable these programs to see if they are causing the issue.

If you've gone through these steps and the board is still not showing up, you may need to reach out to the community forum for further assistance or contact Synthiam support for more in-depth troubleshooting. Remember not to share personal information or network details publicly when seeking help.