Final answer:
If the POS system is down, begin with basic troubleshooting like restarting the system, then contact technical support. Have a backup manual process in place for transactions and keep a detailed record until the system is operational.
Step-by-step explanation:
If a Point of Sale (POS) system is down or polling is incomplete, the first step is to try basic troubleshooting. This could include restarting the system, checking for any loose connections, or ensuring the software is up to date. If these steps do not resolve the issue, you should contact technical support for assistance.
In the meantime, businesses should have a backup manual process in place, such as using cash or manual credit card imprints. It is important to keep track of all transactions carefully to ensure they can be inputted into the system once it is back up and running.