• Check the EQ switch on thereceiver. Toggle it to “30M” position when your Cat cable is less than 30m/100ft long; toggle it to “50M” position when your Cat cable is between 30m/100ft and 50m/164ft long. Power on the extender once again if you have toggled the switch. If there is still no video output, try using a shorter Cat cable to check if it help.
• Make sure the source device and the display device are powered on. And make sure the source device is outputting video signal while the correct HDMI input channel is selected on the display device.
• Connect the source device to the display device directly via an HDMI cable, then set the source resolution to 1080P or After you set the default resolution, please re-connect the source device and the display device to the HDMI extender.
• Make sure all of your HDMI cables work normally. You can connect the source to the display device directly via one of these HDMI cables, to check if video can be shown normally on the display.

• It is recommended to use a Cat5E/6/6A/7 cable, instead of Cat5 or flat cable.
• Please make sure the total length of your cable is less than 50m/164ft, and your cable matches the quality of the corresponding category.
• Please make sure the connectors at both ends of the cable meet the IEEE T568B standard.
• Use a new cable, ortry crimping your Cat cable connectors according to the IEEE T568B standard.
• If you need to usepatch cables at both ends, the length should be as short as possible, no more than 5m/16ft. Please ensure all connectors meet the same standard (IEEE T568B). Also, please note that the total length of the patch cables and the Cat cable should not be over 50m/164ft.

• Please set your source audio’sformat to “PCM” to check.

• Check if your IR connection method is correct. The IR receiver cable needs to be connected to the “IR In”port at one end, and the IR emitter cable needs to be connected to the “IR Out” port at the other end. Please note that the 3.5mm cable connectors need to be fully inserted into the IR ports.
• Check if you use the remote controller correctly and if you place the IR emitter head correctly. When you use the remote controller, it needs to be directly facing the IR receiver head. Besides, the IR emitter head should be placed closely to the IR receiving window of the controlled device.
•  Try controlling the source device directly via your remote controller, without using the HDMI extender. Then check if the IR connection works.

An HDMI balun (also known as an HDMI extender) is a device that allows you to extend HDMI signals over long distances using standard Ethernet cables.

This kind of device can help you transmit high-quality video and audio signals from a source device, such as a DVD player, to a display device, such as a television or projector.

An HDMI balun typically consists of two components: a transmitter and a receiver. The transmitter is connected to the source device and the receiver is connected to the display device. The HDMI signal is converted into a digital Ethernet signal by the transmitter, and then transmitted over a standard Ethernet cable to the receiver, where it is converted back into an HDMI signal.

HDMI balun is a good choice for simple, straightforward HDMI extension applications, where the main focus is on affordability and simplicity. However, it does not support other signals and is limited to shorter distances compared to HDBaseT HDMI extender.

HDBaseT HDMI extender, on the other hand, is a more versatile and capable solution, supporting longer distances and a wider range of signals. However, it is also more expensive than HDMI balun and requires the use of an Ethernet cable of a higher standard, which can add to the cost of the solution.

You don’t have to power both sides. Just put the adapter on either side and it will power the other side of the transmiter or receiver.

No. You may be interested in this ARC HDMI extender, or the eARC HDMI extender.

No. The product supports one-way IR only and you can control TV from the receiver side. This HDMI extender(4KEX70-H2) supports bi-directional IR control and can do what you expect.

Yes. This product does not support USB extension. What you are looking for is an HDMI KVM extender.

• Firstly, the transmitter and receiver shall be connected directly via an Ethernet cable.
• Secondly, connect your source device to the Transmitter via an HDMI cable; connect your TV or monitor to the receiver via an HDMI cable.
• Lastly, power your extender with the adpater. Then it shall work fine. For more information, check the product manual.

(If this information is not helpful to you, you can raise your question in our community.)