If you want to install a new SD card, please follow the steps:

1. Power on the iS-1500 without SD card. Wait 1 minute for device booting. LED status Quick blinking red: no SD card Slow blinking blue: device booting Solid blue: boot completed
2. After device boot completed, insert the new SD card
3. When the LED stop blinking red, long press reset button for 5 seconds. Wait 5 minutes for complete reset to default process.
4. Scan and add the player in iCommander.