> 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/engage-devices/ux1-3-4xx-series/ux1xx/ux115-installation-guide/troubleshooting-guidelines.md).

# Troubleshooting Guidelines

The troubleshooting guidelines provided in the following section are included to assist you in successfully installing and configuring your UX115 terminal. If you have problems operating your UX115 terminal, 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 malfunctions you may encounter while operating your UX115 terminal and steps you can take to resolve them are listed.

{% hint style="info" %}
The UX115 terminal comes equipped with tamper-evident labels. The UX115 contains no user-serviceable parts. Do not, under any circumstance, attempt to disassemble the terminal. 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" %}
*L'utilisation d'une alimentation mal classé peut endommager l'appareil ou provoquer un dysfonctionnement.*

*Verifone recommande la PWR159-00X-01-A.*

*Voir les caractéristiques de l'information d'alimentation.*

Using an incorrectly rated power supply can damage the unit or cause it to malfunction.

Verifone recommends the PWR159-00X-01-A power pack.

See [Specifications](/hardware-products/hardware/engage-devices/ux1-3-4xx-series/ux1xx/ux115-installation-guide/specifications.md) for power supply information.
{% endhint %}

## Blank Display

If the UX115 display does not show correct or clearly readable information:

* Ensure that all cables and external power connections are connected properly to the device and all external devices.
* Remove and reapply power to the unit.
* If the problem persists, contact your local Verifone representative.


---

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