Marshall Stanmore II won't turn on: fixes in order

Quick answer: The Stanmore II has no battery, so it only turns on from mains power. Check the power lead at both ends and the wall socket, then pull and hold the power lever towards the front until the lights come on. If nothing lights up from a working socket, the internal power supply needs a repair.

Video not loading? Open the video on YouTube. It may not match your exact model; check the written guidance and device scope before following it.

The fixes, in order

The Stanmore II is a mains-powered speaker with no built-in battery. Marshall's own troubleshooting says the most likely reason it won't turn on is that it isn't getting mains power. Start there.

1Check the power lead at both ends

Push the mains lead firmly into the back of the speaker and into the wall. A lead that is half in at the speaker end is the most common cause. If you have a spare lead of the same type, swap it in.

2Prove the wall socket works

Plug a lamp or phone charger into the same socket. If you use a power strip, check its switch and try the speaker straight into a wall socket instead.

3Use the power lever the right way

The power control on the top panel is a lever, not a button. Pull it towards the front of the speaker and hold it until the indicator lights come on. A quick flick often isn't enough.

4Unplug it for a minute

Unplug the speaker at the wall, wait about a minute, plug it back in and try the power lever again. This clears a speaker that locked up after a power cut or surge.

5Factory reset if it powers on but misbehaves

If the lights come on but the speaker won't play, won't pair or acts strangely, reset it. Hold the Source and Play/Pause buttons on the top panel together for 7 to 10 seconds, until the source lights flash quickly. Then remove Stanmore II from your phone's Bluetooth list and pair it again. A reset deletes your settings but keeps the firmware.

6Fix dropouts that look like it's switching off

If sound cuts in and out, Marshall points to Bluetooth interference: move your phone closer, remove walls or doors between them, and move the speaker away from other electronics such as Wi-Fi routers.

When it needs a repair

If no lights come on at all from a socket you've proved works, with the lead pushed fully in, the speaker's internal power supply has most likely failed. Contact Marshall support or a qualified repairer. Don't open the speaker yourself: the power supply inside runs at mains voltage.

Which model this covers

These steps are for the Stanmore II Bluetooth. The Stanmore II Voice is also mains powered and has the same power lever, so the first four steps apply to it too.

What to tell support

Keep a short record of your exact device model, software or app version, the symptom or error text, and which steps you tried. Note what changed after each step. You can print this page for reference.

Do not include passwords, recovery codes or private account details in public comments.

Sources

Video by FixIt Mobile on YouTube. See the linked sources for current manufacturer guidance. Menu names and available features can vary by model and software version. How we check fixes.