---
title: Troubleshooting - 2D barcode readers
description: Here is a possible error checklist for 2D barcode readers.
---

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# Troubleshooting - 2D barcode readers

## Here is a possible error checklist for 2D barcode readers.

*Here is a possible error checklist for 2D barcode readers.*

- **Check if the cables are connected to and from the barcode reader.** 
    - *The barcode reader functions via a USB cable from the computer to the reader; please ensure that this cable is connected correctly to both the computer and the reader.*

- **Try to put the reader in a different USB port on the computer.** 
    - *Sometimes, it can be a faulty USB port on the computer.*

- **Make sure that the readers are set up correctly.** 
    - *The settings on a barcode reader can be altered to behave in certain ways. Often, this is altered by scanning the corresponding barcode/QR code in the barcode reader's manual. This should be "Keyboard (HID)".*

- **Restart your computer*****.*** 
    - *In some cases, a reboot of the computer is necessary to clear the data stream from the USB port.*

**Note:**

**\*** POS365 expects the read to end with a return /Enter tab. Make sure this is selected in the setup code.

**\*** For guides in setting up 2D barcode readers, please see the section on hardware and/or our hardware connection guide: 

[Explainer - Hardware connection guide](https://help.posone365.com/pos365/hc/en-dk/articles/8605835201692-explainer-hardware-connection-guide?hsLang=en)

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