LG hides the escape hatch in plain sight: a joystick under the logo, an OS that treats USB mice as first-class citizens, and a network API your iPhone can drive. Any of the three gets you off the wrong input; the third means it never happens again.
How do I use the joystick button?
Reach under the front bezel, centered below the LG logo (a few models: rear bottom-left). Press the joystick straight in: a quick menu pops up. Nudge sideways to the input/source icon, press in to open it, nudge to the input you want, press to confirm. The joystick works even when the current input is a black screen.
What’s the USB mouse trick?
webOS is pointer-driven, so any USB mouse plugged into the TV’s USB port produces a cursor immediately. Click the screen, click the input picker, done. If crouching behind a wall-mounted TV to fiddle a joystick sounds miserable, a $10 mouse is the comfortable alternative, and it also clicks through Settings for network changes.
How do I make my iPhone the input switcher forever?
- iPhone on the same Wi-Fi as the TV.
- Open A Decent Remote; LG TVs on the network appear automatically.
- Accept the pairing prompt on the TV once, with the joystick or the mouse.
- Inputs are now a tap on the phone, alongside volume (including soundbar setups), app launching, keyboard search, and turning the TV on over Wi-Fi.
The complete no-remote pairing story, including wake-on-network details, is in the lost LG remote guide.
Can HDMI-CEC do it automatically?
Usually. LG calls it Simplink: wake the Fire TV stick or PlayStation you want and the TV follows to its input. If it doesn’t, Simplink is switched off in Settings, which the joystick, mouse, or paired phone can all fix.