If the microcontroller electronic music doorbell simulation does not ring, this is how to deal with it:

1. Check the circuit connection: Check whether the circuit connection is correct and whether there is looseness or poor contact.

2. Check the components: Check whether the components are damaged or installed incorrectly, such as capacitors, resistors, crystal oscillators, etc.

3. Check the program: Check whether the program is correct and whether there are grammatical errors or logical errors.