> 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/hardware-products/hardware/kiosks/k450/k450-installation-guide/troubleshooting.md).

# Troubleshooting

The troubleshooting guidelines provided in the following section are included to assist you to successfully install and configure your K450 Kiosk. If you have problems operating your K450 Kiosk, please read through these troubleshooting examples.

If the problem persists even after performing the outlined guidelines or if the problem is not described below, contact your local Verifone representative for assistance. Typical examples of malfunction you may encounter while operating your K450 Kiosk and steps you can take to resolve them are listed.

{% hint style="info" %}
**NOTE** The K450 Kiosk comes equipped with tamper-evident labels. The K450 contains no user serviceable parts. Do not, under any circumstances, attempt to disassemble the unit. Perform only those adjustments or repairs specified in this guide. For all other services, contact your local Verifone service provider. Service conducted by parties other than authorized Verifone representatives may void any warranty.
{% endhint %}

{% hint style="warning" %}
**CAUTION** Using an incorrectly rated power source can damage the unit or cause it to malfunction.

See [Specifications](/hardware-products/hardware/kiosks/k450/k450-installation-guide/specifications.md) for power source information.
{% endhint %}

## Peripheral Device Does Not Work

If any peripheral device (PIN pad or smart card reader) does not work properly:

* Check the power cord connection to the peripheral device.
* Check for proper grounding connections.
* Check that the device connected to the proper port has power and is functioning properly. If possible, perform a self-test on the device in question.
* The cable connecting the optional device to the PC port may be defective. Try a different serial cable.
* If the problem persists, contact your local Verifone representative.


---

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