Step 1: Tap the “Source” or “Input” button to access your list of available sources. Step 2: Make sure your cable’s plugged into the right port. For example. If you plan to choose HDMI as your TV source, then…. Your cable should be plugged into the same port. Step 3: Choose the correct source. Check Problem in Another Monitor. Another method to solve the “No HDMI signal” is to check the issue on another working monitor. This is to identify whether any components of your display device are damaged. If you do not get any signal, know that there are problems with your PC, cables, and ports. Press the home button on your remote control. Navigate though Settings >> All Settings >> General >> Reset to Initial Settings. Select Reset and enter your TV’s password if prompted, then Confirm to execute. Several possible causes can cause color problems to your LG smart TV. Often generalized as “Blue Tint or Color Bleeding” it’s Mar 11, 2017. #6. At first, you connect the HDMI cable and works fine but then it stops with the no signal thingy for no apparent reason. The only working solution I figured out is to follow these steps: 1. Disconnect your HDMI cable from your computer. 2. Get out of HDMI channel to any other TV channel. 3. Preheat oven to 385 degrees, unscrew the back panel of the TV, their are alot of screw's, and some by the composite plugs hiding. The ribbon with tape on it, that ribbon is removed by flipping the black piece back and the ribbon slide's out. You are removing the PCB board the one with the HDMI ports on it and some USB's. u2NQKq.