Hello. Thanks for sharing what’s been going on with your LG 75UA7700AUA TV. We appreciate you walking us through the random powering‑on, unexpected audio, and the channel behavior you’ve been seeing — we want your TV to feel reliable every time you use it. When a TV turns on by itself or switches to channels unexpectedly, it can sometimes be tied to features like Quick Start+, timers, or external devices sending signals through HDMI‑CEC. Turning off Quick Start+, checking that no timers are enabled, and disconnecting external devices one at a time can help narrow down the source. Power‑cycling the TV by unplugging it for a full minute can also help reset the internal board after a repair. You can refer to this helpful link for guidance on the intermittent power issues you're encountering with your LG TV: https://www.lg.com/us/support/help-library/lg-tv-troubleshooting-tv-intermittently-powers-onoff--1427121212479

If you’d like us to take a closer look at your case or continue troubleshooting with you, feel free to reach out to lgdigitalcare@lg.sprinklrsupport.com. ^James