Four types of hdmi grabber tests (hdmi-cec, rainbow signal) - Hardware Support - Hyperion-Project Forum
![Amazon.com: HDMI Blocker, preventing CEC Interference Between Devices. Such as: Interference Between DVD and TV; Interference Between Set-top Box and Blu-ray Player; Interference Between Sound bar and TV, etc. : Electronics Amazon.com: HDMI Blocker, preventing CEC Interference Between Devices. Such as: Interference Between DVD and TV; Interference Between Set-top Box and Blu-ray Player; Interference Between Sound bar and TV, etc. : Electronics](https://m.media-amazon.com/images/I/71x85tECbCL._AC_SX425_.jpg)
Amazon.com: HDMI Blocker, preventing CEC Interference Between Devices. Such as: Interference Between DVD and TV; Interference Between Set-top Box and Blu-ray Player; Interference Between Sound bar and TV, etc. : Electronics
![BlueRigger 4K HDMI CEC Less Adapter (4K, UHD, ARC, 1080p, Ethernet) - HDMI Male to Female Adapter - Compatible with HDTV, TV Stick, Game Consoles, Laptops, Soundbar : Electronics BlueRigger 4K HDMI CEC Less Adapter (4K, UHD, ARC, 1080p, Ethernet) - HDMI Male to Female Adapter - Compatible with HDTV, TV Stick, Game Consoles, Laptops, Soundbar : Electronics](https://m.media-amazon.com/images/I/81vscWD4q6L._AC_SL1500_.jpg)