How to perform a Power Drain? Lew August 31, 2020 22:01 Updated Unplug all the cables from the EPOS Hold down the power button for at least 10 seconds Reconnect all the cables to the epos. Related articles When can a power drain be done? How to Set up EPOS Send Discount To Customer How to exclude items from the existing discounts? How can I enable the loyalty points scheme?