Nintendo Switch 2 users are facing persistent HDMI connectivity issues in docked mode

Nintendo Switch 2 users are reporting widespread issues with HDMI signal loss lately, particularly when connecting the console in docked mode to LG TVs. Many owners are describing blackouts, flickering, and "invalid format" messages, especially when HDR is enabled. The most persistent problems arise when not using source-based tone mapping on LG TVs, as per several users and devs.

Going by the discussion among users, it seems that the interaction between the Switch 2’s HDR output and LG’s default tone mapping settings could be a source of trouble. Enabling HDR without matching the TV’s tone mapping mode can lead to visual glitches, which is an issue referenced by both affected gamers and analysts responding to queries in the thread. One user recommends switching LG TV HDR Tone Mapping to the HGiG setting, which may not only resolve signal stability issues but also improves HDR image accuracy regardless of the console in use. This could be one of the key steps for LG TV owners using the Switch 2 (curr. $449 on Amazon).

YouTube channels (like HDTVTest) and user forums (like NintendoLife) are also corroborating these findings, with before-and-after visual comparisons showing blown-out HDR colors fixed after changing the TV’s tone mapping to HGiG. The same sources recommend using only "Ultra High Speed" HDMI cables to avoid additional compatibility issues.

Also, some users are reporting that turning off the 120Hz refresh rate in Switch 2 settings reliably stops signal loss and screen flicker. While this does limit the console to lower refresh rates, it is currently one of the simplest fixes. Some users also stated that bypassing intermediary devices (such as HDMI switchers or soundbars) and connecting the Switch 2 dock directly to the TV may help.

While it’s still unclear if this is a Nintendo or LG firmware incompatibility, end-users are reporting that Nintendo support is still unaware of a systemic problem, and that they are directing affected consumers towards repair or replacement. We'll follow up on this news in case there's a future update from Nintendo.