In that case, you can do the followings to fix this issue: First, turn off your TV and Input devices. Then, input the HDMI cable to the HDMI 1 port. Now, turn the TV and other devices on and press the input button on your remote. Then, scroll down and select HDMI 1 by pressing the up and down button on the remote.
1. Open the Camera app on your Android or iPhone. 2. Point the smartphone's rear camera toward the upper part of the remote and Press any keys.
Try these steps out first: Try different sources. If the problem is with the cables used, replace them. Check to see if the problems persist with different streaming services. If there's still a problem, do a reset. If the reset still does not work, consider bringing it to a repairman. 3. My Sharp TV Pixelates or Stutters
To re-activate those inputs go to your TV's menu under "setup". Then select "input label" and press enter. Once you enter the menu, select the inputs you want to activate (in your case input 1 and 2) and use the side arrows on your remote to select a name.