プロジェクターの音が出ない原因と解決法|Bluetooth・HDMI・内蔵スピーカーのトラブル完全ガイド

No Sound from Your Projector: A Complete Troubleshooting Guide for Bluetooth, HDMI, and Built-in Speaker Issues

Aiden Tsang
🔇 "No sound despite having a picture" or "Cannot connect to Bluetooth speaker" are almost always caused by overlooked settings or issues with the connection order. This article will guide you through 8 common causes and their solutions.

First Check! 80% of No Sound Issues are Due to These 3 Things

Check Item Symptom Solution
① Volume Settings No sound at all or extremely low sound Increase volume on the device or remote control
② Mute Status Picture present, but no sound Check the mute button on the remote control
③ Bluetooth Connection Target No sound from external speaker Check the connection target in Bluetooth settings

8 Solutions by Cause

1
Check volume and mute settings Most Common Cause

This is the most common cause. Check if the volume is set to 0 or if mute is ON using the volume buttons on the remote control or the device itself.

Solution: Press the volume + button on the remote to increase the volume. Press the mute button to unmute. Aestiquo P1 and Q1 allow direct volume adjustment via the remote control.

2
Check Bluetooth connection target

If you are connected to a Bluetooth speaker or earphones, the built-in speaker will not produce sound because the projector's audio output has switched to the Bluetooth device. Conversely, if no sound comes from the Bluetooth speaker, the pairing might be disconnected.

Solution: Go to Settings → Bluetooth → Check connected devices. If you want to hear sound from the built-in speaker, turn Bluetooth OFF. If you want to hear sound from an external speaker, try re-pairing.

3
Check audio output settings when connected via HDMI

When connecting a DVD player or PC via HDMI, the cause may be the audio output settings on the connected device. HDMI transmits both video and audio simultaneously, but audio may not be output depending on the settings.

Solution (PC): Go to Sound Settings → Change output device to HDMI (Projector).
Solution (DVD Player): Check the audio output settings from the DVD player's menu and ensure HDMI audio output is enabled.

4
Check Android TV's audio output settings (P1 only)

The Aestiquo P1 comes with Android TV, so Android TV's audio settings can sometimes have an impact. This is particularly common when using apps like Netflix or YouTube.

Solution: Go to Settings → Device Preferences → Sound → Set Audio output to "Internal speakers" or the connected Bluetooth device. Also check the in-app volume settings.

5
Check the earphone jack connection

If earphones or an AUX cable are plugged into the 3.5mm jack, the built-in speakers will automatically turn OFF.

Solution: Check if anything is plugged into the earphone jack. Even if it's only partially inserted, the built-in speakers might turn OFF, so make sure to remove it completely.

6
Restart the projector

Temporary software glitches can sometimes cause audio to stop working.

Solution: Turn the power completely OFF, wait 30 seconds, then turn the power ON again. For P1, you can also select "Restart" from the Android TV settings menu.

7
Reset Bluetooth speaker pairing

If the Bluetooth speaker shows "Connected" but no sound is coming out, the pairing information might be corrupted.

Solution: On the projector, "delete/forget" the Bluetooth device → reset the speaker's pairing → try pairing again. Bring the speaker within 5 meters for connection.

8
Check for firmware and app updates

Audio issues can sometimes arise from bugs in old firmware or apps.

Solution (P1): Go to Settings → Device Preferences → About → Check for System Update. Perform the update while connected to Wi-Fi.

For improved audio quality: Utilize external speakers

The built-in speakers of projectors are designed with portability in mind, so there are limits to their sound quality. If you want to enjoy movies with richer sound, we recommend combining it with a Bluetooth speaker or soundbar.

Connection Method Sound Quality Ease of Setup Recommended Use
Built-in Speaker ⭐⭐⭐ ⭐⭐⭐⭐⭐ Convenient use, solo viewing
Bluetooth Speaker ⭐⭐⭐⭐ ⭐⭐⭐⭐ Wireless high-quality, family viewing
AUX (3.5mm) Connection ⭐⭐⭐⭐ ⭐⭐⭐⭐⭐ Stable wired, no delay
HDMI ARC-compatible TV/Soundbar ⭐⭐⭐⭐⭐ ⭐⭐⭐ Full home theater setup

✅ Final Checklist

  • Confirmed volume is not 0 and not muted
  • Checked Bluetooth connection target and ON/OFF status
  • Confirmed nothing is plugged into the earphone jack
  • Checked audio output settings of the HDMI-connected device
  • Checked Android TV's audio output settings (P1)
  • Restarted the projector
  • Reset and reconnected Bluetooth pairing
  • Updated firmware

If you've tried all of the above and the issue persists, the built-in speaker may be faulty. For Aestiquo products, please contact support via the support page.

For HDMI connection issues, please also refer to the Projector HDMI Not Working Troubleshooting Guide. For how to connect a projector and DVD player, see the HDMI Connection Guide.

🎬 View Aestiquo Projectors

Frequently Asked Questions

What if I have a picture but no sound?
Video and audio are processed separately, so audio-only problems can occur. First, check the volume and mute settings, then the Bluetooth connection target and earphone jack status. If connected via HDMI, you also need to check the audio output settings of the connected device.
Sound stopped coming from the built-in speaker after connecting to a Bluetooth speaker.
This is normal operation. When connected to a Bluetooth speaker, the audio output automatically switches to the Bluetooth speaker. To revert to the built-in speaker, turn off Bluetooth in the settings or disconnect from the Bluetooth speaker.
What if the sound cuts out or has a delay?
Audio delay (lip sync issues) during Bluetooth connection can be improved by using an aptX-compatible Bluetooth 5.0 or higher speaker. Also, maintaining a distance of 5m or less between the projector and speaker will stabilize the connection. Switching to a wired (AUX) connection will eliminate delay.
Netflix/YouTube has sound, but only when connected to a DVD player there is no sound.
It is highly likely that the DVD player's audio output settings are the cause. Set the audio output to HDMI from the DVD player's menu. It is also effective to try replacing the HDMI cable.
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