> 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/support-nordics/v660p/how-tos/how-to-test-the-chip-reader.md).
# How to Test the Chip Reader
Run the card reader test on your V660P to check the chip reader is working, and clean the reader if needed.
{% hint style="info" %}
**Use this when** you need to check whether the chip (card) reader on your V660P is working.
{% endhint %}
## Run the card reader test
{% stepper %}
{% step %}
### Open Diagnostics
1. Open the app list: swipe **up** on the home screen. If your V660P opens straight into **Connect Express**, swipe **down** from the top of the screen and tap the **settings icon** in the bottom-right corner to get to the Android menu.
2. Tap **Diagnostics**.
{% endstep %}
{% step %}
### Open the Card Reader Test
Scroll down and select **Card Reader Test**.
{% endstep %}
{% step %}
### Insert a card and check the result
Insert a card when asked. The test shows whether the chip reader is working.
{% endstep %}
{% endstepper %}
## If the test fails: clean the chip reader
{% stepper %}
{% step %}
### Turn off the terminal
Hold the **power button** for about **1 second**, then tap **Power off**.
{% endstep %}
{% step %}
### Clean the reader
Take a card — ideally a debit or credit card with raised numbers. Insert it **upside down and back to front**, so the chip is **not** in the reader. Remove and insert it **10 times**, wiggling it each time to dislodge dirt inside the reader.
{% endstep %}
{% step %}
### Turn the terminal back on
Hold the **power button** for about **2 seconds** until the start screen appears.
{% endstep %}
{% step %}
### Try a test transaction
Take a small test payment by inserting a card, to check the chip reader is working.
{% endstep %}
{% endstepper %}
{% hint style="info" %}
**Still not working?** The chip reader may be damaged — see [Not Detecting Inserted Cards](/support-nordics/v660p/errors/not-detecting-inserted-cards.md) and contact Support to log a replacement terminal. In the meantime, you can still take **contactless** payments.
{% endhint %}
Keywords
Also called: card reader test, chip reader test, test card reader, chip not reading, clean chip reader. Search terms: chip reader, card reader, test, diagnostics, clean, insert, chip.
---
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