HDMI port not working
High-definition multimedia interface (HDMI) ports are typically on all home theater devices. Without these present, HDMI cables cannot be used. An HDMI is an audio/video interface that allows video and data to transfer to and from a computer monitor, TV, video projector or audio device. HDMI has replaced the analog video. Below are the functions of an HDMI port.
Output – HDMI ports send video and audio to projectors, TVs, and video/audio receivers. These types of devices send high-definition content protection (HDCP) which is recognized at end of the cable.
Input – HDMI is considered a shared procedure that needs communication from transferring to and from a compatible device. By doing this, the input from the port is necessary. HDMI ports are linked to the device that decodes incoming signals from the source and allowing data.
Changing devices – Linking multiple HDMI cables can be helpful when using several devices. Every source has a video and audio as well as an HDCP key. So, if ports are connected to a switcher, this can cause the signal to be lost. Switched HDMI ports are being sold, although receivers are equipped with HDMI switching ports.
When connecting an HDMI cable, often connection issues can occur. Below is a list of troubleshooting tips.
- Check cable connections – Often the HDMI connection can become loose and cause video and audio issues. These connections can slide out if the device has been moved. If this causes an issue, purchasing self-locking HDMI cables may prevent this in the future.
- Different turn-on order for devices – First turn the TV on, then the other HDMI source. Try switching this order around and see if a better connection is found. If switching the order did not work, with the TV and the HDMI source on, try another input. Once you have done this, check if the signal is restored. Once a correct sequence is found, write it down for help in the future.
- Check the device’s video resolution output setting – Check the menu for video resolution output to make sure it is set to “AUTO.” If it is, reset the setting to match the original resolution of the TV. Most resolutions are set to either 720p, 1080p or 4K.
- Eliminating potential causes – If an HDMI source is connected to a home theater receiver that is attached to the TV and nothing is showing on the screen, try going through potential causes.
Connect the HDMI device directly to the TV to get around the home theater receiver. If that works, the HDMI source component/home theater receiver is often the issue. Keep the HDMI connected to the TV and create a different connection such as plugging the cable into a different port for audio. This may not be the best connection technique but will work either temporary or permanent.
If these troubleshooting tips do not work or are not persistent, check if any updates for the HDMI source is available that can help fix the issue. Also, checking to see if any customer complaints have been made against the device can figure out if this is a common problem.
Connecting a laptop/PC to TV using HDMI
When using a laptop/PC as a home theater, issues can arise when connecting the two devices. Make sure that the laptop/PC settings are selected as default for the HDMI output connection. In case the image is not showing up on the TV try the following troubleshooting techniques.
- First, turn on the laptop/PC with the HDMI already connected to the TV that is also on.
- Try turning on the laptop/PC while the power to the TV is off, then turn the power on to the TV.
- If none of the above tips solved the problem, try turning on the laptop/PC first while the TV is turned on and then connect the HDMI to the laptop/PC and TV. The TV VGA input may need to be used instead of an HDMI cable.