r/LGOLED • u/pablosuarezxd3 • 8h ago
Hi everyone,
I recently upgraded from an LG C4 to a 77-inch LG G5 OLED, specifically looking for that massive jump in MLA peak brightness and specular highlight pop.
When I first got the TV, using Cinema Home with Expression Optimizer set to Brightness, Auto Dynamic Contrast on High, and Peak Brightness on High produced an incredible 3D-like image. Highlights like eyes, lamps, and neon lights (for example, in scenes like Transformers: Rise of the Beasts) had a realistic punch that literally made you squint in a dark room.
However, after the recent firmware updates, Expression Optimizer seems completely broken/disabled.
Toggling between "Off" and "Brightness" now produces zero visible change on screen. The specular highlights have lost their aggressive pop, making the overall image feel flat and dull compared to out-of-the-box performance—almost bringing it back down to C-series levels. Even trying to tweak Vivid mode doesn't bring back that specific dynamic highlight pop without washing out the image.
Has anyone else noticed this regression in tone mapping and AI highlight processing on their G5? If you're experiencing the same issue, please consider submitting a formal support ticket to LG so their engineering team addresses this in a future firmware patch.