Questions & Answers

Q: QuestionIs this monitor wall-mountable?

• A:Answer No, this monitor is not wall-mountable.

Q: QuestionWhat is the contrast ratio of this OLED monitor?

• A:Answer The monitor has a contrast ratio of 1,500,000:1.

Q: QuestionWhat streaming services are available on this monitor?

• A:Answer You can access Netflix, Prime Video, Apple TV, Disney+, HBO Max, and over 300 free LG Channels directly on the monitor.

Q: QuestionHow is the monitor's connectivity?

• A:Answer It offers HDMI 2.1, DisplayPort 1.4, and USB Type-C (with 65W power delivery) for versatile connectivity.

Q: QuestionDoes this monitor support FreeSync and G-SYNC?

• A:Answer Yes, it supports both AMD FreeSync Premium Pro and NVIDIA G-SYNC for a tear-free and stutter-free gaming experience.

Q: QuestionWould I have to use HDMI 2.1 Port to drive this monitor at the supported 240Hz without DSC? (Display Stream Compression)

Asked 5 months ago by Kelrics.

• A:Answer The LG UltraGear™ 39" OLED Curved WQHD 240Hz 0.03ms G-Sync®/FreeSync™ Premium Smart Gaming Monitor with DisplayHDR 400 TRUE BLACK - White, Model # 39GX90SA-W support a maximum resolution of 3440 x 1440 @ 240 Hz over HDMI without DSC...^Ivan.

  Answered 5 months ago by LG Digital Customer Care

  
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Q: Questionwhats name of demo playing on this monitor in store?

Asked 6 months ago by joseph.

• A:Answer Hello there, Joseph. Thank you for reaching out about your LG 39GX90SA‑W UltraGear OLED monitor. We understand your situation and are happy to explain the in‑store demo setup. In our retail locations, the monitor runs a proprietary UltraGear OLED Showcase Demo Loop when put into Store Mode. Internally, this demo is labeled as “StoreMode_Demo.mp4” in the webOS Samples section, but it’s not distributed for end‑user download. The loop highlights key features—gaming footage at 240 Hz, HDR scenes, and webOS app previews. Here’s one helpful troubleshooting step if you’d like to view or verify the demo content yourself: Enter Store Mode on your monitor: Press the joystick, go to Settings → All Settings → General → Support → Home/Store Mode, and select Store Mode. Open the Media Player app from the home screen. Navigate to Samples → Store Mode Only. You’ll see StoreMode_Demo.mp4 listed—select it to play the same loop you see in stores. If the file doesn’t appear, please make sure your monitor’s firmware is up to date by visiting the Support & Downloads section on LG.com and installing the latest webOS update. That will restore the full Store Mode demo package. https://www.lg.com/us/monitors/lg-39gx90sa-w-gaming-monitor#pdp_specs We’re here to help with any further questions or setup tips. Please send us a private message on social media @LGUSSupport and our team will be more than happy to explore additional solutions. —Renzo

  Answered 6 months ago by LG Digital Customer Care

  
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