If your microwave doesn't "ding" or produce any audible signal when the cooking time is over, it could indicate a few possible issues:
Faulty sound mechanism: The sound mechanism in the microwave that produces the "ding" sound may be malfunctioning or broken. This could be due to a faulty speaker or a problem with the sound circuitry.
Volume settings: It's also possible that the volume settings on your microwave have been adjusted or muted, preventing the sound from being audible. Check the user manual or settings menu to ensure the volume is set to an audible level.
Software glitch: In some cases, a software glitch or error within the microwave's control panel may be causing the lack of audible notification. In such cases, a power cycle or factory reset might resolve the issue.
Other display or control issues: If the microwave is not producing any sound at all, it's worth checking if there are any other display or control issues. Make sure the microwave is functioning properly in terms of heating food, and if not, it might require repair or replacement.
If your microwave is still under warranty, it is advisable to contact the manufacturer or a qualified service technician to diagnose and address the issue. They will be able to provide specific guidance based on the make and model of your microwave.