> For the complete documentation index, see [llms.txt](https://commanderhelp.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://commanderhelp.verifone.com/general-help-guides/general-help/how-to-check-for-power/commander.md).

# Commander

#### Use this when the Commander looks off or has no heartbeat.

If the led on heartbeat(HB) is visible, the Commander has power.

*If there is no heartbeat(HB light is Off), check the A/C Input 1 cable and the UPS or wall outlet.*

<details>

<summary>Keywords</summary>

**Also called:** Commander off, Commander no power, no heartbeat, HB light off, Commander not turning on

**Keywords:** Commander power check, check power on Commander, A/C Input 1, heartbeat HB light, Commander A9, Commander power cord, Commander UPS, Commander wall outlet

</details>

### How to check power on Commander

{% stepper %}
{% step %}

#### Look for the heartbeat(HB)

If the heartbeat(HB light) is visible, the Commander has power.

If the HB light is Off, proceed to Step 2.

![](/files/1b31033c6bd51476b4cd0269dc275ba3aba3cbf3)
{% endstep %}

{% step %}

#### Check the A/C Input 1 cable

Go to the back of the Commander.

Find **A/C Input 1**.

Make sure the power cord is fully plugged into A/C Input1.

![](/files/645748ca9965f9b6172647b4c1e514ef555176bf)
{% endstep %}

{% step %}

#### Check the other end of the power cord

Trace the same power cord to the UPS or wall outlet.

Make sure that end is fully plugged in too.

{% hint style="info" %}
The Commander should stay plugged into a UPS. This protects the unit and helps provide stable voltage.
{% endhint %}
{% endstep %}
{% endstepper %}

{% hint style="info" %}
N**eed assistance? Contact Verifone Helpdesk at anytime.**

* Use our **Chat** platform
* Or call **1.800.VERIFONE (837.4366)**

Tell us the troubleshooting steps you’ve already tried. This saves time and gets you the right support faster.
{% endhint %}

### Related power checks

* [Check power on the UPS / Battery Backup](/general-help-guides/general-help/how-to-check-for-power/ups-battery-backup.md)
* [How to check for power](/general-help-guides/general-help/how-to-check-for-power.md)


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