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PC No Sound on TV After Windows Update? Fix It

📅 7 August 2026 ⏱ 4 min read 🔧 PC Repair

You plug your PC into your TV or monitor via HDMI, fire it up, and — nothing. No sound. Everything was working perfectly yesterday, and the only thing that changed was a Windows update overnight. You're not alone; this is one of the most common support calls we get here on the Costa Blanca, and the good news is it's almost always fixable yourself in a few minutes.

Why Does a Windows Update Break Audio?

Windows updates frequently replace or reset your audio drivers — the small pieces of software that tell Windows how to talk to your TV or monitor over HDMI. When the update installs a newer (or sometimes older) driver, it can silently switch your default audio output back to the PC's built-in speakers or simply lose track of your TV altogether. The TV or monitor doesn't get the audio signal, so you hear nothing.

Step-by-Step Fix

Step 1 — Check Your Default Playback Device

This is the fix for 80% of cases. Right-click the speaker icon in your taskbar (bottom right). Choose Sound settings (Windows 11) or Playback devices (Windows 10). You'll see a list of audio outputs. Look for your TV or monitor — it usually shows up as HDMI Output, Digital Output, or your TV's brand name.

Windows sound output settings on a PC screen

Step 2 — Make Sure the HDMI Cable Is the Culprit (or Isn't)

Unplug the HDMI cable and plug it back in firmly — both ends. Try a different HDMI port on the TV if you have one. If possible, swap the cable for another one. A loose or damaged cable can look fine but pass video without audio. While you're there, check the TV's input/source menu to confirm it's set to the right HDMI port.

HDMI cable plugged into the back of a monitor

Step 3 — Roll Back or Reinstall the Audio Driver

If Step 1 didn't show your TV or monitor in the list at all, the driver is likely the problem. Here's how to deal with it:

  1. Press Windows key + X and choose Device Manager.
  2. Expand Sound, video and game controllers.
  3. Right-click your audio device (often labelled Intel(R) Display Audio or Realtek High Definition Audio) and choose Properties.
  4. Click the Driver tab. If Roll Back Driver is available (not greyed out), click it and follow the prompts — this restores the previous working driver.
  5. If Roll Back is greyed out, choose Update Driver → Search automatically instead and let Windows fetch the latest compatible version.
  6. Restart your PC when prompted.
Updating a driver in Windows Device Manager

Step 4 — Run the Windows Audio Troubleshooter

Go to Settings → System → Troubleshoot → Other troubleshooters (Windows 11) or Settings → Update & Security → Troubleshoot → Playing Audio (Windows 10). Run the troubleshooter and apply any fixes it suggests. It won't always solve the problem, but it catches some common permission and service issues that a manual fix might miss.

Step 5 — Check the Windows Audio Service Is Running

Press Windows key + R, type services.msc and press Enter. Scroll down to Windows Audio. If the Status column doesn't say Running, right-click it and choose Start. Also check Windows Audio Endpoint Builder — both should be Running and set to Automatic startup.

If None of That Works

Occasionally a Windows update installs a fundamentally incompatible driver for your specific PC model. At that point you'll want the exact driver from your PC manufacturer's support page (Dell, HP, Lenovo, Asus, etc.) rather than the generic one Windows finds. Search for your model number + "audio driver" on the manufacturer's site, download the right package, and install it manually.

If you're not comfortable doing that — or the problem keeps coming back — it's worth having someone check it properly. We see this regularly at Campoverde Repair and it usually takes under half an hour to sort out. You might also find our guide on 5 warning signs your laptop needs a repair useful if you're noticing other odd behaviour alongside the sound issue.

Quick tip: Before any future Windows update, note which audio device is set as your default. If the update breaks sound again, you'll know exactly where to look first.

Summary

StepWhat it fixesDifficulty
Set default playback deviceOutput switched back to PC speakersEasy
Reseat HDMI cableLoose connection / wrong inputEasy
Roll back / reinstall driverBroken or wrong driver versionModerate
Run troubleshooterService or permission faultsEasy
Check Audio serviceService stopped after updateEasy

FAQ

Why does my PC have no sound through HDMI after a Windows update?

Windows updates often replace or reset audio drivers and can switch the default playback device back to the PC's built-in speakers. Go to Sound settings, find your TV or monitor in the Playback Devices list, and set it as the default — that fixes most cases immediately.

My TV shows the picture fine but there's no audio — what's wrong?

HDMI carries both video and audio, but they can fail independently. The most common cause is Windows selecting the wrong audio output after an update. Check Playback Devices first. If your TV isn't listed there at all, the audio driver needs updating or rolling back in Device Manager.

How do I roll back an audio driver in Windows?

Press Windows key + X, open Device Manager, expand 'Sound, video and game controllers', right-click your audio device, go to Properties → Driver tab, and click 'Roll Back Driver' if the option is available. Restart the PC afterwards.

Should I let Windows Update install audio drivers automatically?

Windows Update is convenient but sometimes installs generic drivers that don't fully support your hardware. For better stability, download audio drivers directly from your PC manufacturer's website and install them manually — especially after a major Windows update.

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