How to fix the Toshiba TV sound but no picture problem.See the full guide: https://www.lapseoftheshutter.com/toshiba-tv-sound-but-no-picture/
I get the message that my remote is now set up to control my TV. The TV is a Toshiba 32C12OU1. After the setup is complete, the Roku remote works to control volume up, volume down, mute, and power off. But after the TV is off, the Roku remote will not turn it back on. In the auto-detection process, the option that is selected is "1."
Step1: Make sure that the HDMI port is connected to the correct input port of the TV. Check it by selecting the Start Button and then the Input option. To check the correct input port press Enter. Step 2: Ensure that the device is powered on and is running. Step 3: Make sure the cables must be connected firmly.
Conclusion. If you’re seeing horizontal lines on your Toshiba TV, try the following fixes: Power-cycle the TV (Unplug from the outlet for 60 seconds) Disconnect and reconnect all HDMI connections. Return (if under warranty) Remove back panel and clean electronics with compressed air. Reseat T-CON ribbon cables. Hi Dan, I turned it off and on in a dark room. The only light that I see is the Toshiba white light on the bottom of the screen. I have cable and I have seen the TV act like this if I have the remote set to the cable box and power it off. The white light comes on but no pic