# Hardware

It is best to refer to your original user guide to effectively trouble shoot hardware, having said that here are a few tips

* [**Pin Pad**](https://app.gitbook.com/@retailcloud/s/hardware/payment-devices/common-issues) - make sure that the pin pad has an external power supply (or the POS has a USB Port with a power supply)
* [**Magnetic Stripe readers**](https://retailcloud.gitbook.io/point-of-sale/windows-pos-winpos/getting-started/hardware/magnetic-stripe-readers)
* [**Increasing Memory Size allocated to the Application**](https://retailcloud.gitbook.io/point-of-sale/windows-pos-winpos/getting-started/hardware/increasing-memory-size)
* [**Optimus Computer (Inventory Scanning)**](https://retailcloud.gitbook.io/point-of-sale/windows-pos-winpos/getting-started/hardware/optimus-computer-inventory-scanning)

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[**Click here to know more about Payment Devices**](https://app.gitbook.com/@retailcloud/s/hardware/payment-devices/common-issues)
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