---
title: "Troubleshooting and support VX820"
url: "https://docs.adyen.com/point-of-sale/user-manuals/terminal-deprecation/vx820-user-manual/troubleshooting-and-support-vx820"
source_url: "https://docs.adyen.com/point-of-sale/user-manuals/terminal-deprecation/vx820-user-manual/troubleshooting-and-support-vx820.md"
canonical: "https://docs.adyen.com/point-of-sale/user-manuals/terminal-deprecation/vx820-user-manual/troubleshooting-and-support-vx820"
last_modified: "2019-04-19T08:51:00+02:00"
language: "en"
---

# Troubleshooting and support VX820

[View source](/point-of-sale/user-manuals/terminal-deprecation/vx820-user-manual/troubleshooting-and-support-vx820.md)

## Self-service

If there is an issue with your payment terminal, first try to diagnose and solve the issue yourself, using our [Troubleshooting documentation](/point-of-sale/pos-troubleshooting). In many cases, this will be the quickest solution.

## Ask for assistance

If you cannot resolve the issue using the Troubleshooting documentation, send an email to our [Support Team](https://ca-test.adyen.com/ca/ca/contactUs/support.shtml?form=other).

Provide the following information:

* Merchant account.
* PSP reference of the transaction, if applicable.
* Terminal serial number. This number is available in the **Device info** and also printed on the back of the terminal (for example, S/N:123-456-789).