If your Xiaomi Portable Photo Printer 1S won’t power on and the indicator light remains off, please try the following steps:
1. Press and hold the power button for at least 3 seconds to turn on the device;
2. Check whether the power button provides normal tactile feedback. Also, look for any foreign objects or debris around the button that can be obstructing it;
3. The battery can be completely drained. Connect the printer to a charger and let it charge for a while, then try turning it on again;
4. If the above steps don’t work, it's recommended to contact the after-sales service for professional inspection and repair.