> 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/android-devices/v640-series/previous-models/v660p-2/v660p-2-installation-guide/troubleshooting-guidelines.md). # Troubleshooting Guidelines The troubleshooting guidelines provided in the following section are included to help you install and configure your V660p-2 successfully. Typical examples of malfunction you may encounter while operating your V660p-2 device and steps you can take to resolve them are listed in this chapter. 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. {% hint style="info" %} **NOTE:** The V660p-2 comes equipped with tamper-evident labels. The V660p-2 unit contains no user serviceable parts. Do not, under any circumstance, attempt to disassemble the device. 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" %} **CAUTION:** Before troubleshooting, ensure that the power supply being used to power the device matches the requirements specified at the bottom of the device. (See [Specifications](/hardware-products/hardware/android-devices/v660-series/v660p/previous-models/v660p-2/v660p-2-installation-guide/specifications.md), for detailed power supply specifications.) Obtain the appropriately rated power supply before continuing with troubleshooting. {% endhint %} ## Device Does Not Start If the device does not start: * Ensure that the device is plugged into a dedicated power source. * Check if the power cable connector is plugged in properly. ## Device Display Does Not Show Correct/Readable Info If the device display does not show correct/readable info: * Check all the cable connections. If the problem persists, then contact your local Verifone representative for assistance. ## Blank Display When the device display is blank: * If the device display is dark, tap the screen with the stylus or your finger. If the unit was in screen-saver mode, the screen will turn on when touched. * If the display does not show correct or readable information, then check all the cable connections. If the problem persists, then contact your local Verifone representative for assistance. ## Transactions Fail to Process There are several possible reasons why the unit may not be processing transactions. Use the following steps to troubleshoot failures. ### Checking Magnetic Card Reader To check magnetic card reader: {% stepper %} {% step %} ## Perform a test transaction Perform a test transaction using one or more different magnetic stripe cards to ensure that the problem is not a defective card. {% endstep %} {% step %} ## Ensure the card is swiped properly Ensure that you are swiping the card properly (see [Using the Magnetic Card Reader](/hardware-products/hardware/android-devices/v660-series/v660p/previous-models/v660p-2/v660p-2-installation-guide/device-setup.md#using-the-magnetic-card-reader)). {% endstep %} {% step %} ## Process a transaction manually Process a transaction manually using the keypad instead of the card reader. If the manual transaction works, then the problem may be a defective card reader. {% endstep %} {% step %} ## Contact Verifone Contact your local Verifone representative if the problem persists. {% endstep %} {% endstepper %} ### Checking Smart Card Reader To check smart card reader: {% stepper %} {% step %} ## Perform a test transaction Perform a test transaction using several different smart cards to ensure the problem is not a defective card. {% endstep %} {% step %} ## Ensure the card is inserted correctly Ensure that the card is inserted correctly (see [Using the Smart Card Reader](/hardware-products/hardware/android-devices/v660-series/v660p/previous-models/v660p-2/v660p-2-installation-guide/device-setup.md#using-the-smart-card-reader)). {% endstep %} {% step %} ## Check the MSAM cards Ensure that the MSAM cards are properly inserted in the slots and are properly secured (see [SIM/SAM Card](/hardware-products/hardware/android-devices/v660-series/v660p/previous-models/v660p-2/v660p-2-installation-guide/device-setup.md#sim-sam-card)). {% endstep %} {% step %} ## Contact Verifone Contact your local Verifone representative if the problem persists. {% endstep %} {% endstepper %} --- # Agent Instructions This documentation is published with GitBook. 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