--- title: Why does my MoCA device stop working after connecting it to a specific modem or TV? description: If your ScreenBeam MoCA ECB stops working after connecting it to a specific modem or TV, the issue could be related to compatibility, signal interference, or configuration conflicts. Here are some pos --- [Skip to content](https://residential.screenbeam.com/support/why-does-my-moca-device-stop-working-after-connecting-it-to-a-specific-modem-or-tv#main-content) [![ScreenBeam logo](https://residential.screenbeam.com/hs-fs/hubfs/ScreenBeamLogo-8in-3-1.webp?width=180&height=22&name=ScreenBeamLogo-8in-3-1.webp)](https://www.screenbeam.com/) Open main navigation Close main navigation - [Open Ticket](https://helpdesk.screenbeam.com/ticket) [Open Ticket](https://helpdesk.screenbeam.com/ticket?hsLang=en) How can we help? - There are no suggestions because the search field is empty. 1. [ScreenBeam Retail Knowledge Base](https://residential.screenbeam.com/support?hsLang=en) 2. [General FAQ's](https://residential.screenbeam.com/support/general-faqs?hsLang=en) 3. [Hardware and Compatibility](https://residential.screenbeam.com/support/general-faqs?hsLang=en#hardware-and-compatibility) # Why does my MoCA device stop working after connecting it to a specific modem or TV? If your ScreenBeam MoCA ECB stops working after connecting it to a specific modem or TV, the issue could be related to compatibility, signal interference, or configuration conflicts. Here are some possible reasons and steps to resolve the problem:  ### **Signal Interference from the Modem or TV** **Cause**: Some modems or TVs output signals (e.g., DOCSIS from cable modems or TV broadcast frequencies) that interfere with MoCA’s frequency range (500-1675 MHz).  **Solution**: Install a Point of Entry (PoE) MoCA filter on the coaxial line entering your home or at the modem/TV connection point. This blocks external signals from disrupting the MoCA network. Ensure the filter supports MoCA frequencies (check for “MoCA-compatible” labeling).  ### **Incompatible Modem Configuration** **Cause**: If the modem has built-in MoCA functionality, it might conflict with the ECB unless properly configured (e.g., overlapping MoCA channels or security settings).  **Solution**: Check if your modem is MoCA-enabled (consult the modem’s manual or ISP). If it is, ensure both the modem and ECB use the same MoCA version (e.g., MoCA 2.5) and security settings. Log into the ECB GUI and verify the “Security Enabled” setting matches the modem’s MoCA privacy settings. If mismatched, set a consistent password (12-17 digits) or disable security temporarily to test.  ### **Coaxial Port Issue on the Modem or TV** **Cause**: The modem or TV’s coaxial port might not support MoCA passthrough, or it could be damaged.  **Solution**: Connect the ECB to a different coaxial outlet (e.g., one closer to the router) to bypass the modem/TV port. If using a splitter, ensure it’s MoCA-compliant (5-1675 MHz) and not a standard cable TV splitter, which can block MoCA signals.  ### **Power or Hardware Failure** **Cause**: Connecting to the modem or TV might coincide with a power surge, loose connection, or hardware defect in the ECB.  **Solution**: Confirm the power light is green using the provided power adapter. If not, try a different outlet or adapter (same specs: typically, 5V/2A). Reset the ECB to factory settings by pressing and holding the reset button for 10-15 seconds, then reconnect it.  ### **TV-Specific Interference** **Cause**: If connected near a TV, the TV’s internal tuner or cable box might introduce noise on the coax line.  **Solution**: Disconnect the TV’s coaxial cable temporarily and test the ECB alone. If it works, add a MoCA filter between the TV and the coax line.  ### **Next Steps** Test the ECB with a different modem or TV to isolate the issue. If the problem persists, contact ScreenBeam support with your modem/TV model details (e.g., brand, model number) for specific compatibility advice. You can reach support via retailsupport.screenbeam.com or the contact info in your ECB manual.  - [General FAQ's](https://residential.screenbeam.com/support/general-faqs?hsLang=en#main-content) - [Installation and Configuration](https://residential.screenbeam.com/support/general-faqs?hsLang=en#installation-and-configuration) - [Troubleshooting and Optimization](https://residential.screenbeam.com/support/general-faqs?hsLang=en#troubleshooting-and-optimization) - [Hardware and Compatibility](https://residential.screenbeam.com/support/general-faqs?hsLang=en#hardware-and-compatibility) - [Advanced Features](https://residential.screenbeam.com/support/general-faqs?hsLang=en#advanced-features) - [Maintenance and Updates](https://residential.screenbeam.com/support/general-faqs?hsLang=en#maintenance-and-updates) - [Understanding MoCA](https://residential.screenbeam.com/support/general-faqs?hsLang=en#understanding-moca) - [Purchasing](https://residential.screenbeam.com/support/general-faqs?hsLang=en#purchasing) - [Customization and Scalability](https://residential.screenbeam.com/support/general-faqs?hsLang=en#customization-and-scalability) - [Security and Privacy](https://residential.screenbeam.com/support/general-faqs?hsLang=en#security-and-privacy) - [ECB7250](https://residential.screenbeam.com/support/ecb7250?hsLang=en) - [ECB6250](https://residential.screenbeam.com/support/ecb6250?hsLang=en) - [ECB6200](https://residential.screenbeam.com/support/ecb6200?hsLang=en) - [End of Life Products](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#main-content) - [MyWirelessTV 2 - Wireless HD Transmitter & Receiver Kit](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#mywirelesstv-2-wireless-hd-transmitter-receiver-kit) - [MyWirelessTV 3 - 4K Wireless HD Connection Kit](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#mywirelesstv-3-4k-wireless-hd-connection-kit) - [ScreenBeam Mini 2](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#screenbeam-mini-2) - [ScreenBeam Mini 2 Kit (ScreenBeam Mini 2 & USB Transmitter)](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#screenbeam-mini-2-kit-screenbeam-mini-2-usb-transmitter) - [ScreenBeam USB Transmitter](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#screenbeam-usb-transmitter) - [ScreenBeam USB Transmitter 2](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#screenbeam-usb-transmitter-2) - [ScreenBeam Wireless Display Receiver](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#screenbeam-wireless-display-receiver) - [ScreenBeam Wireless Adapter Kit (with The ScreenBeam Display Adapter Receiver & USB Transmitter)](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#screenbeam-wireless-adapter-kit-with-the-screenbeam-display-adapter-receiver-usb-transmitter) - [ScreenBeam Wireless Adapter Kit (with The ScreenBeam Display Adapter Receiver & USB Transmitter 2)](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#screenbeam-wireless-adapter-kit-with-the-screenbeam-display-adapter-receiver-usb-transmitter-2) - [ECB2500C - MoCA Network Adapter](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#ecb2500c-moca-network-adapter) - [ECB5240M - MoCA Network Adapter](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#ecb5240m-moca-network-adapter) - [ECB6000 - MoCA 2.0 Network Adapter](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#ecb6000-moca-2-0-network-adapter) - [ECB6200 - Bonded MoCA 2.0 Network Adapter Branded Actiontec](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#ecb6200-bonded-moca-2-0-network-adapter-branded-actiontec) - [WCB3000N - 802.11n Wireless Network Extender](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#wcb3000n-802-11n-wireless-network-extender) - [WCB6200Q - 802.11ac Wireless Network Extender](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#wcb6200q-802-11ac-wireless-network-extender) - [WEB6000Q - 802.11ac Wireless Network Extender With Gigabit Ethernet](https://residential.screenbeam.com/support/end-of-life-products?hsLang=en#web6000q-802-11ac-wireless-network-extender-with-gigabit-ethernet) [![Chill listening crop-3](https://residential.screenbeam.com/hs-fs/hubfs/ScreenBeamLogo-2in.webp?width=194&height=24&name=ScreenBeamLogo-2in.webp "Chill listening crop-3")](http://www.screenbeam.com)   Copyright © 2025, ScreenBeam Inc.