Here's some info that helps if your LG device doesn't turn on or off. The power button contains a gray colored round button actuator in a chrome housing. The problem is that the monitor will not turn off, either from the Power/Display power-off options (nothing happens after set time passes), or with a program like ScreenOff and Monitor Off. It is the first button on the right hand side as you are facing the monitor. Update: It appears to have stopped playing nicely with my Sonos speaker setup. I plug in the one that isn't working into one of the 4 USBC ports that was working with the other monitor and it kind of wakes it up so now the one that wasn't working works in another of the USBC ports and I can run both. Solved! The volume & mute buttons just stopped working from one day to the next. But, for the past few days nothing is working to power up the LG monitor. Same problem, and the solution above (turn off, unplug, 10 seconds power button, plug back in, turn on) didn't work for me. ... Connect another known working monitor to determine the issue is not the graphics card. The words "Power - Cancel" (solid dot between words) are printed above the button Apparently the stuck button was actually caused by the chrome housing/ring being pressed in too far at the bottom or otherwise misaligned. So when came time to reposition my setup to accommodate the new addition (the portrait Samsung monitor), I had to unplug power and video cables from my 2 ultrawides, but not from the TV. No display after turning monitor ON (not boot, black screen & no power lights) Make sure the power button on the front panel is normal for boot Check if the signal cable (VGA / DVI / HDMI / DisplayPort) is well connected and confirmed another end of the output cable has been firmly connected to computer input port (graphics card). When I plugged everything back in and turned on my computer, my main screen, TV and new monitor turned on, but my second ultrawide did not turn on. Extend your session by clicking OK below. My Magnavox flat screen turns on but the buttons won't let us turn power down or change settings: Solved! OK. Due to inactivity, your session has expired. LG smart TV - power button problem: Why isn't my fire cube action button working? You should press the button/joystick once to gett he OSD on main menu, then go to inputs, a new OSD appears (on mine anyway),select the input up/down to highlight choice, and then press button again to confirm selection and switch to it. The LG support sent me back to "official spare parts resellers", that do not have the piece (and never had it at all, apparently). Due to inactivity, your session will end in approximately 2 minutes. Every few weeks, one won't work. I tried to reconnect it to the power by unplugging and plugging but it didn't work. The strange thing is that the power indicator in front of TV doesn't turn on or flashes and the LCD also doesn't turn on. The button under the screen that allows me to turn it on/off, adjust volume and switch sources is broken, I can keep using the screen using a tiny screwdriver to make contact, but it's working less and less. On most displays, the power button is the far right button in this group. The LG L1932TQ does have a power button on the underside of the panel. Confirm the monitor is connected to a power source. Using one of these apps, will start turning the monitor off, but it … Please sign in again to continue. Hi everyone I have a 5 years old LG LED TV and it suddenly stopped working. While the Apple online store does not say whether this has any buttons, I was able to find some photos on the LG website that confirms their presence on the underside of the bezel: LG 27MD5KA‑B: LG UltraFine 5K 27 Inch Monitor at CES 2017. 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