If the Xiaomi Portable Photo Printer Pro doesn't turn on when pressing the power button, please follow these steps:
First, make sure you are pressing and holding the power button firmly for a few seconds, as a short press can not activate the device;
If it still does not power on, connect the printer to a reliable power source using the original charging cable. Check whether the power connection is stable and the adapter is working properly;
Inspect the charging port for any foreign objects, dust, or debris that can block the connection. Also, examine the charging port for any signs of damage or deformation;
If the problem persists after these checks, consider contacting after-sales service for further assistance or professional inspection.