HDMI 'No Signal' to a Monitor or TV

'No signal' on an HDMI display can come from the TV, the cable, the source device, or a settings mismatch. The good news is that it is systematic to diagnose.

Start With the Display

Use the TV or monitor's own remote or buttons to select the correct HDMI input. If you have multiple HDMI ports on the TV (HDMI 1, HDMI 2, etc.), cycle through each one to make sure you are on the right input for the cable you plugged in.

Check and Swap the Cable

HDMI cables do fail, and a damaged cable often causes no signal rather than a degraded image. Try a different cable — borrow one if needed. Also reseat both ends of the cable firmly; HDMI connectors can loosen over time.

Restart Everything in Order

1. Disconnect the HDMI cable from both devices.
2. Shut down the PC completely.
3. Turn off the monitor or TV at the wall.
4. Wait 30 seconds.
5. Reconnect the HDMI cable.
6. Power on the display first, then the PC.

Starting with the display already on gives the PC's graphics card something to detect when it boots, which often resolves handshake failures.

Try a Different HDMI Port

If your PC has more than one HDMI or DisplayPort output (common when you have both integrated and dedicated graphics), try each one. Note that on some desktops, the ports on the motherboard are disabled if a dedicated GPU is installed — use the ports on the graphics card instead.

Check the Graphics Driver

Open Device Manager, expand Display adapters, right-click your GPU, and choose Update driver. After the update, use Win + P to select your preferred display mode.

Test the Display With Another Source

Plug a phone, streaming stick, or games console into the same HDMI port on the TV. If that source displays fine, the issue is with the PC's HDMI output rather than the TV or cable.

If nothing displays from your PC on any HDMI device with any cable, ask us — the GPU or integrated graphics may need further attention.