If the Xiaomi Instant Hot Water Dispenser does not work after being powered on, first ensure that the power cord is securely connected to both the device and the power outlet. Next, try pressing the Child lock button to unlock the water dispenser, then press and hold the Dispensing button until the device begins to function. If the problem persists after 2-5 attempts, it is advisable to consult the local after-sales service center for assistance, helping you identify any underlying issues and ensure that the device is operating safely and correctly.