How to Connect a Laptop to a TV with HDMI (Windows and Mac)

Connecting a laptop to a TV turns it into a giant monitor — great for presentations, video calls, photos, browser-based streaming or games. HDMI is the simplest and most reliable way to do it.

This guide shows you how to connect a laptop to a TV with HDMI on Windows and Mac, and how to fix the usual problems. Prefer wireless? See how to cast your phone to a TV, which also covers laptops.

What you need

1. Check your laptop’s ports

Port on laptop	What to buy
HDMI (full size)	A standard HDMI cable
USB-C / Thunderbolt (with video)	USB-C to HDMI cable or adapter
Mini DisplayPort	Mini DisplayPort to HDMI adapter
Micro or mini HDMI	The matching HDMI cable

Not every USB-C port carries video. Look for a DisplayPort or Thunderbolt symbol next to the port, or check the laptop’s specifications.

2. Choose the right cable

For 4K at 60 Hz, use a Premium High Speed (or Ultra High Speed) HDMI cable, and an adapter that supports 4K60 and HDR if you need them.

Step-by-step: connecting

1. Connect the cable from the laptop to a free HDMI port on the TV.
2. Turn on the TV and select the matching HDMI input.
3. The laptop should detect the TV automatically within a few seconds.

If nothing appears, see the troubleshooting section below.

Windows settings

Choose a display mode

Press Windows key + P to choose:

• Duplicate — same image on both screens (presentations).
• Extend — TV becomes a second screen (drag windows across).
• Second screen only — laptop screen turns off (watching films).

Set resolution and scaling

1. Right-click the desktop → Display settings.
2. Select the TV display.
3. Set Display resolution to the recommended (native) value, e.g. 3840×2160 for 4K TVs.
4. Adjust Scale (e.g. 150–200%) so text is readable from the sofa.
5. In Advanced display, choose the highest supported refresh rate.

Send sound to the TV

1. Click the speaker icon in the taskbar, or open Settings → System → Sound.
2. Under Output, choose the TV.

Mac settings

Choose a display mode

1. Open System Settings → Displays.
2. Choose whether the TV is an extended display, or mirror your main display.

Set resolution

Select the TV in Displays, then pick a resolution. “Default for display” is usually best; “More space” fits more on screen but makes text smaller.

Send sound to the TV

System Settings → Sound → Output, then choose the TV.

Getting the best picture

• Use the TV’s native resolution.
• If edges are cut off, turn off overscan: on the TV, look for Just Scan, Screen Fit, Original or Full pixel; on Windows, some graphics control panels also offer scaling options.
• Set the TV input to PC mode or rename the input “PC” — many TVs reduce processing and improve text clarity.
• Enable HDR in Windows display settings only if both laptop and TV support it and content looks right.

Streaming from a laptop

Laptop streaming has quirks: some services only offer the highest quality in certain browsers or in their own apps. Our guide to streaming on a laptop: browser vs app explains how to get the best quality.

Copy protection (HDCP) also applies over HDMI — if a protected video shows a black screen on the TV, try a different cable or adapter, or update graphics drivers.

Troubleshooting

“No signal” on the TV

1. Check the TV is on the correct HDMI input.
2. Reconnect the cable firmly at both ends.
3. Try another HDMI port and another cable or adapter.
4. On Windows, press Windows + P and choose Duplicate or Extend.
5. Restart the laptop with the cable connected.
6. Update the graphics drivers (Windows) or macOS.

No sound on the TV

• Choose the TV as sound output (see above).
• Make sure the TV isn’t muted and the laptop volume is up.

Flickering or dropouts

• Replace the cable or adapter with a certified one.
• Lower the refresh rate or resolution to test.
• Avoid long passive cables for 4K.

Picture too big, small or blurry

• Set native resolution and adjust scaling.
• Turn off overscan on the TV.

Using the TV as a monitor for work

A TV makes a big, cheap second screen — with a few adjustments:

• Use the TV’s PC or Game mode to reduce input lag and processing that blurs text.
• Set scaling so text is comfortable from your seating distance.
• Turn down sharpness — it creates halos around text.
• Lower brightness for long sessions to reduce eye strain.
• Watch out for burn-in on OLED TVs: avoid leaving static taskbars and windows on screen for many hours every day, and use the TV’s screen-protection features.

Laptop lid closed? Set the power options

To use only the TV with the laptop closed:

• Windows: Control Panel → Power Options → Choose what closing the lid does → Do nothing (when plugged in).
• Mac: connect power, an external keyboard and mouse, then close the lid — the Mac switches to the external display.

Gaming and presentations

• Gaming: use the TV’s Game mode, the highest refresh rate your laptop and TV support, and a cable rather than wireless for the lowest delay.
• Presentations: use Extend mode so your notes stay on the laptop while slides show on the TV; turn on Do Not Disturb to keep notifications private.

Choosing an adapter that works

Not all USB-C adapters are equal. Look for:

• 4K at 60 Hz support (some cheap adapters are limited to 30 Hz, which feels sluggish).
• HDR support if you need it.
• Power passthrough if the laptop has only one USB-C port.
• A reputable brand — poor adapters are a common cause of flicker and dropouts.

Wireless alternatives

• Google Cast from the Chrome browser.
• AirPlay from a Mac to Apple TV or AirPlay-compatible TVs.
• Miracast (Windows “Cast” to compatible TVs).

Compare the two main wireless options in Chromecast vs AirPlay. Wireless is convenient, but a cable gives the best quality and lowest delay.

The bottom line

Plug in, pick the right input, choose a display mode, set native resolution and send the sound to the TV. A good cable or adapter avoids most problems, and a few TV settings make text sharp and the picture fit perfectly.