How To Fix Marshall Stanmore II Not Turning On

Is your Marshall Stanmore II speaker not turning on? This could be caused by a software glitch, bad battery, faulty charging cable, or a defective charger. To fix this you will need to perform a series of troubleshooting steps.

Marshall Stanmore II is one of the latest Bluetooth speaker models available in the market made by Marshall, a popular audio equipment manufacturer. It is a compact, portable speaker with a classic design and delivers powerful, clear sound with deep bass. It supports wireless and wired connections, has multiple connectivity options and includes physical controls for easy access to volume, bass and treble controls.

Technical specifications:

  • Dimensions: 13.78 x 7.68 x 7.28 in (350 x 195 x 185 mm)
  • Weight: 4.65 kg (10.25 lb)
  • Frequency response: 50-20,000 Hz
  • Maximum sound pressure level: 101 dB
  • Audio amplification: One 50 Watt Class D amplifier for the woofer, Two 15 Watt Class D amplifiers for the tweeters.
  • Connectivity: Bluetooth 5.0 aptX, 3.5mm input, RCA input connect
  • Supported audio formats: MP3, WMA, AAC, ALAC, FLAC, AIFF, WAV

Why is my Marshall Stanmore II speaker not turning on?

Marshall Stanmore II speaker not turning on

One of the issues that you might experience with your Marshall Stanmore II Bluetooth speaker is when it does not turn on. This can be an annoying experience especially if you are about to use it to listen to your favorite music.

Here’s what you need to do to fix this Marshall Stanmore II Bluetooth speaker not turning on issue.

Solution 1: Press the power button of your Marshall Stanmore II Bluetooth speaker

The first troubleshooting step you should try if your Acton II Bluetooth speaker does not turn on is to press and hold for a second the power button.

Disconnect the power cord from the Acton II Bluetooth speaker then wait for at least a minute.

Connect AC power cord to the mains electricity supply.

Press the Power button.

If all goes well then your Marshall Stanmore II Bluetooth speaker should turn on. If it doesn’t then proceed to the next step.

Solution 2: Check the Marshall Stanmore II speaker charging port and power cord

The Marshall Stanmore II speaker has an AC port that is used to get power into the device. It does not have any built-in battery so you need to have the power cord plugged to the wall socket in order for this speaker to work.

You need to make sure that the speaker AC port is clean and free from any dirt or debris inside. You can clean the charging port using a thin object such as a toothpick. The port will have connector pins, make sure that it is not bent or damaged. If you have a damaged charging port then you will need to have this fixed.

You should also check the AC power cord you are using for any signs of defect. If necessary, replace this power cord with a new one.

Solution 3: Plug the Marshall Stanmore II speaker to a different wall socket

One of the reasons why your Marshall Stanmore II speaker won’t turn on is because you are plugging it to a mains electricity supply. Make sure to connect the mains lead to a working wall socket.

Solution 4: Factory reset your Marshall Acton II speaker

There’s a possibility that this problem is caused by a software glitch. If this is what’s causing the issue then you will need to perform a factory reset.

With the mains lead connected to a power outlet push and hold both the Source button and the play/ pause button for 7 seconds.

After the reset has completed you will need to connect you speaker again to your Bluetooth device.

Solution 5: Have your Marshall Stanmore II speaker checked at the nearest service center

In case you are still unable to turn on your Marshall Stanmore II speaker then this might already be caused by a faulty hardware component. You will need to have this fixed at a service center.

Frequently Asked Questions

  1. How to select audio source on Marshall Acton II?

    Push the SOURCE button to toggle between Wi-Fi, Bluetooth and AUX audio source.
    A lit indicator shows which source is selected.The source can also be selected from the Marshall Voice App.

  2. Can I connect two Bluetooth devices to the speaker at the same time?

    No, the speaker can only be connected to one device at a time.

  3. Is there an app for this speaker?

    You can use the Marshall Bluetooth app which you can download from the Google Play Store.

  4. How do I turn on or turn off the Marshall Stanmore II?

    To turn on the speaker just pull and hold the power lever to the front of the speaker until the power on sound plays and the indicators light up. To turn off the speaker you have to pull and hold the power lever again to the front of the speaker until the power off sound plays and the indicators turn off.

  5. How to connect Marshall Stanmore II via Bluetooth?

    Select Bluetooth as the input. Pushing the SOURCE button toggles the input sources.
    Push and hold the SOURCE button for 2 seconds. The Bluetooth indicator starts to blink.
    Enable Bluetooth on your Bluetooth device (Smartphone, Tablet, Computer)
    Select ACTON II from the Bluetooth list and accept pairing. The Bluetooth indicator on the speakers stops blinking and remains lit when the units are connected.

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Chad Buenaflor

Chad has been in the tech industry since 2000. He has a degree in Electronics Engineering and is interested in the hardware and software side of technology. Initially working for a Japanese semiconductor company as a Test Engineer for nearly 10 years, he then pursued his passion for internet technology by working for the support team of Time Warner Cable then finally joining TheDroidGuy as one of their troubleshooting and tech writers. On his free time he plays his favorite games on his PC, Xbox Series X, and Android phone. Contact me at Email

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