Your Xbox Series S is on, you can hear the fan spinning and the front light is on, but the TV screen is black with a "No Signal" message. The console is running. The handshake between the Series S and the TV just isn't happening. Most of the time this is a quick fix once you narrow down the culprit.
Start with the obvious: make sure the TV is on the correct input. Hit the Input or Source button on your TV remote and cycle through HDMI 1, HDMI 2, HDMI 3, and so on. If you have multiple devices plugged in, it's easy to land on the wrong port after a recent cable swap or TV power cycle.
If the input is correct and you still get nothing, work through the fixes below.
Try a Different HDMI Cable
The HDMI cable that came with the Series S is rated for 4K 60Hz and the console's native 1440p 120Hz output. If you swapped to an older cable from a previous console, it may not have the bandwidth to carry the signal, especially at higher refresh rates. Go back to the original Microsoft-supplied cable if you still have it, or grab any cable labeled as "High Speed" or "Ultra High Speed." Even a cable that worked fine yesterday can stop working, bend the cable near the connector and check for kinked or exposed wire.
Move to a Different HDMI Port
TV HDMI ports can fail quietly, especially on sets that are a few years old. Unplug the cable from the current port and try a different one. If the picture comes back, the original port is likely the problem. On 4K TVs, the port labeled "4K@60" or "Game" is usually the best bet for the Series S, since it supports the higher bandwidth the console requests during handshake.
Force a Full Power Cycle
Hold the power button on the console for a full 10 seconds until it shuts off completely. Then unplug the power cord from the wall or the back of the console and wait at least 30 seconds. Plug everything back in and press the power button to boot up. This clears any stuck state in the HDMI controller and forces a fresh handshake negotiation with the TV. This step alone fixes a surprising number of no-signal cases, especially if the issue started after a TV firmware update or a power outage.
Boot the Series S in Low Resolution Mode
If the console is trying to output 1440p or 4K upscaled and the TV can't handle that resolution, you'll get a black screen. On the Series S, you can force the console to boot at a low resolution that any TV can display. Fully shut down the console by holding the power button for 10 seconds. Then press and hold the power button and the sync button (the small button on the front near the USB port) simultaneously. Keep holding both buttons until you hear two power-up tones about 10 seconds apart. The console boots into 640x480 mode. Once you have a picture, go to Profile & system > Settings > General > TV & display options and set the resolution to 720p or 1080p to see if that stabilizes the signal. If 1080p works fine but 1440p doesn't, your TV may not support 1440p at the refresh rate you're using.
Turn Off HDR Temporarily
The Series S outputs HDR10 by default, but some TVs, especially budget models or older 4K sets, lose the signal entirely when switching into HDR mode rather than gracefully falling back to SDR. If you got a picture in low-resolution mode but lost it again after raising the resolution, try disabling HDR. Head to Profile & system > Settings > General > TV & display options > Video modes and uncheck Allow HDR10. Save the setting and let the console renegotiate. If the picture holds, the TV has an HDR handshake issue, and you may be able to resolve it later with a TV firmware update.
Bypass a Soundbar or AV Receiver
If your Series S is connected through a soundbar, AV receiver, or any HDMI switch, those devices can interfere with the video handshake. Older receivers without HDMI 2.0 support often fail to pass 1440p signals cleanly. Unplug the console from the receiver and plug it directly into the TV. If the picture comes back, the intermediary device is the bottleneck. From there you can run audio to the receiver via optical or eARC while keeping video direct to the TV.
Check If the TV Firmware Is Up to Date
TV manufacturers push firmware updates specifically to address HDMI handshake bugs, especially for game consoles that use 120Hz and VRR. Open your TV's settings menu and look for a software update option. If your TV has been online but you haven't checked for updates in the past year, you could be running firmware from 2022 that predates HDMI compatibility fixes. The update takes 5 to 15 minutes and the TV will restart a couple of times. Once it's done, power cycle both the TV and the Series S and test again.
Test the Series S on Another Display
Plug the console into a different TV or monitor with HDMI input. Any display will do. If the picture appears there, the problem is specific to your original TV and its HDMI implementation. If the Series S also shows no signal on a second display, the issue is on the console side, likely the HDMI port itself. The Series S uses a straightforward HDMI 2.0b interface, but the port can fail due to physical stress at the cable connection point.
Reset Display Settings via the Troubleshooting Menu
If you can't get a picture at all, even in low-resolution mode, the display settings themselves may be corrupted. The Series S has a recovery menu that resets video output to factory defaults without needing to see the screen. Hold the power button for 10 seconds to fully shut down the console. Then hold the power button and the sync button together until you hear two power-up tones. That loads the Startup Troubleshooter at default 480p resolution. From there, select Reset this Xbox > Reset and keep my games & apps. This wipes all settings including display configuration but leaves your installed games and saved data intact. No data loss, just a clean slate for the video output.
