The following are the steps that you can follow: Turn off the TV and disconnect the power cord. Now, unplug the HDMI switch from the TV and also unplug the amplifier connection. Now, wait for a few minutes and plug the switch back into the TV. This will solve the issue, and the HDMI port will start working again. These steps will work not only for cable boxes, but for other devices as well. For example: Playstation or XBOX. 8. Change the TV HDMI Signal Format. Some TV brands (SONY, for instance) recommend changing your TV’s HDMI signal format if your PS5 or other devices won’t connect via HDMI. Say your TV’s HDMI signal format is set to “Standard,” switching it to “Enhanced” might fix the problem. Some TV brands/models have this option as “Enhanced In summary LG engineers tested several OLEDxxC1 and C2 models (including OLED65C2PUA). They were able to recreate the issue only 1/600 times and the single occurrence was on a OLED77C1. They have advised that the root cause is "a signal without HDMI EYE Margin" sent from the X-Box. The TV cannot recognize the signal and so it appears as No Signal. Option 2: Use the bedroom stb with the Lounge TV until DSO (assuming it will work in the lounge - if it doesn't it's option 1 again). Option 3: Buy a very cheap stb, similar to the bedroom stb, for the lounge TV until DSO. Option 4: Buy the PVR you want to get in September and hope it is more sensitive than the TV. G. To update your LG TV software, go to the settings menu on your TV and select “ Software Update ” or “ Update Center “. Follow the instructions to check for and install any available updates. To update your LG TV apps, go to the LG Content Store and select “ My Apps “. Check for any available updates and install them if necessary. A "No Signal" message is displayed on top of the pictures that can be turned off by pressing the red button on the magic remote. OR. A black screen can be displayed which includes a "No Signal" message in white text that bounces around. There is no way to turn off the white "No Signal" message. This option can be turned on (and replace option 1 Whenever I switch my LG TV to a different input and see a “No Signal” message, the first thing I check is that the device is actually connected. For example, if I switch my TV’s input to “HDMI” to watch Netflix on my FireStick and get a “No Signal” message, I go behind the TV and make sure the FireStick is securely connected to I just bought PC with RTX3060Ti card. I connect it to LG 65UJ620V TV which has 3xHDMI 2.0 ports. There is no signal from both HDMI ports. I had no issues with laptops having GT750 and GTX960 cards. The only way to get signal is: Have HDMI cable disconnected on the GPU side. Turn on PC; Turn on TV; Plug the HDMI cable after 20 seconds. If this resolves your problem, there’s an issue with the previous port. So, mark and ensure not to use it the next time. Also, if you have an extra HDMI cable, try using this to find out if there’s a problem with the previous adapter. Moreover, you can also connect your PC to a TV to see if there are any underlying issues within the monitor Q3kVerM.