> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/support-nordics/v400m/errors/wont-start.md).

# Won't Start

What to do when your V400M won't start — start it with the green button, charge it, then turn it off and on.

{% hint style="info" %}
**Use this page when** your terminal won't start up, is frozen, or isn't responding.
{% endhint %}

<details>

<summary>Keywords</summary>

Also called: won't start, won't turn on, won't power on, frozen, not responding, stuck, black screen, restart. Search terms: won't start, restart, green button, red button, frozen, black screen, charger.

</details>

## Symptoms

You may see one or more of the following:

* The terminal won't start up.
* The terminal is frozen or doesn't respond when you press the buttons.

**Why this happens:** the terminal may be switched off or out of battery, or it may have stopped responding and need a restart.

## Resolution

{% stepper %}
{% step %}

### Start the terminal

Hold down the **green button** for a few seconds until the screen lights up.

✅ **Terminal starts — stop here.** ❌ **Still won't start — continue to Step 2.**
{% endstep %}

{% step %}

### Charge the terminal

Connect the terminal to its **charger** and leave it to charge for a while. Then try starting it again, as in Step 1.

✅ **Terminal starts — stop here.** ❌ **Still won't start — continue to Step 3.**
{% endstep %}

{% step %}

### Turn the terminal off and on

The V400M is a portable terminal, so make sure it isn't on charge while you do this.

1. Take the terminal **off charge** — unplug the charger.
2. Hold down the **red button** for about **7 seconds**, until the screen goes dark.
3. Wait **10–15 seconds**.
4. Hold down the **green button** until the screen lights up.

✅ **Terminal starts — stop here.** ❌ **Still won't start — contact Support below.**
{% endstep %}
{% endstepper %}

**If the terminal starts.** It's ready to use.

**If the terminal still won't start.** Contact Support below.

## Still not working?

{% hint style="info" %}
**Still need help? Contact Verifone Support.**

If the steps above haven't resolved the issue, <mark style="color:red;">contact Verifone Support</mark>. Tell us the troubleshooting steps you've already tried — it helps us get you to the right support faster.
{% endhint %}


---

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