A device connected to your Toshiba TV that doesn't display or appears distorted is frustrating. HDMI problems can result from problems with the cable, problems with the inputs on your TV or the external device, or the video output settings on the external device. Troubleshoot your problem to isolate the cause so you can take the appropriate action to resolve your Toshiba TV's HDMI problem.
Cable Box Audio
If you're cable box is connected to your Toshiba TV using an HDMI cable and you're seeing video but not hearing audio, check the cable box to see if you need to specify the audio output. Some cable boxes have an Audio switch on them that lets you specify what type of cable you want your audio feed to come through; make sure that switch is set to HDMI if you want that cable to carry the audio as well as the video.
Make sure the HDMI cable is firmly pushed into the output on an external device and the input on the Toshiba TV. If your HDMI cable is not firmly connected, you experience either no video or audio, or poor quality video or audio. Don't jam the cable into an input, but don't be afraid to give your HDMI cable an extra push to ensure a strong connection.
If you're using an HDMI cable to connect a PC to your Toshiba TV, you may not see an outputted image or you may see a distorted image if your PC's output resolution isn't supported by the Toshiba TV. Because each Toshiba TV is different, check the user manual that came with your TV for a list of PC resolutions that your specific TV supports.
Your HDMI cable may be damaged. Disconnect the cable from the Toshiba TV and the external device it's connected to and then look it over for fraying, cuts or any other physical signs of damage. Look at the connectors on the cable to see if they are bent or damaged in any way. If the cable looks alright, check the HDMI output on the external device and the HDMI input on the TV for physical signs of damage. If everything checks out, try connecting the two devices using an HDMI cable that you know works. If that HDMI cable works, the cable you were using is defective and needs to be replaced. However, if the different cable doesn't work, try connecting the external device to another TV using the HDMI cable you know works. If video from the external device is output without an issue, the HDMI input on your Toshiba TV is defective and needs to be repaired. If video from the external device still doesn't output, the HDMI output on the external device needs to be repaired.
Video Output Settings
The video output settings on your external device may not be supported by your Toshiba TV. For example, if your external device is set up to output in 1080i and your Toshiba TV doesn't support that resolution, the video from the external device likely won't appear. Check the owner's manual that came with your Toshiba TV to see what resolutions it supports and change the output resolution on your external device accordingly.