Nintendo Switch 2 docks require a 54W AC adapter — not the original Switch’s 39W unit, and only Ultra High Speed HDMI cables will deliver its full 4K/60Hz or 1080p/120Hz output. That’s the hard requirement, confirmed by Nintendo’s official troubleshooting guide published Friday morning. No workarounds. No legacy compatibility. If your TV won’t light up when you slot in the Switch 2, start there. Not with the HDMI port label or controller batteries. Those come later. The Switch 2 is now shipping globally, but early adopters are hitting these exact bottlenecks: underpowered third-party chargers, mislabeled ‘HDMI 2.0’ cables sold as ‘4K-ready’, and TVs that don’t expose HDMI 2.1 ports in their on-screen menus, even when they have them. Nintendo says the dock’s rear panel hides three ports: one for AC power (top), one for HDMI-out (middle), and one for USB-C (bottom). The AC adapter must be fully seated. Both ends, and plugged into a live outlet. A dead socket won’t charge the handheld or enable TV output. And yes, you should test that socket with another device first. The included cable is Ultra High Speed (UHS), rated for 48Gbps and HDMI 2.1. Older HDMI cables. Including the one bundled with the original Switch, won’t cut it. Neither will most $10 ‘4K’ cables sold online without UHS certification. If your TV has HDMI 2.1, it’ll likely support ALLM (Auto Low Latency Mode), HDMI Ultra HD Deep Color, or Input Signal Plus. All of which Nintendo recommends enabling per-port in your TV’s picture or advanced settings. But many mid-tier 2022–2024 LG, Sony and Samsung models list HDMI 2.1 only in spec sheets, not on-screen menus. You’ll need to check your model’s manual or manufacturer site. Resolution and power sync settings matter too. System Settings > Display > TV Resolution must be set to Automatic or manually matched to your TV’s native capability. And System Settings > Display > Match TV Power State, while convenient. Won’t wake older TVs. It’s optional, not essential. Nintendo sells replacement 54W AC adapters for $35 on its US site and ₹4,499 on its Indian store. No regional pricing variance is listed elsewhere. The Switch 2 itself launched at $349.99 in the US and ₹34,999 in India. What’s next? Firmware updates are rolling out to fix intermittent HDMI handshake failures, Nintendo confirms those are software-related and patchable. Hardware replacements for faulty docks are already in transit to service centres in North America and India. Expect turnaround times of 7–10 business days.