Why isn't my USB port powering my device?

First, ensure that all USB power/failure indicator lights are illuminated in constant blue. If either USB port has a fault, the indicators will flash blue. Make sure the total power of all USB devices on both ports does not exceed 3.1A combined. Additionally, check that the unit has a full charge and recharge if necessary. Some household electronic devices may not be compatible with this USB charging port, so consult your device's manual to confirm compatibility. (Page 1 — Dos Años)