If your Sylvania microwave's keypad is only responding to number inputs but not displaying anything when you press other buttons, it is likely experiencing a technical issue with the control panel or the display itself. Several possible causes could be responsible for this problem:
Control Panel Malfunction: The control panel may have developed a fault, preventing certain buttons from functioning properly. Over time, the control panel's connections may become loose or worn out, leading to unresponsiveness.
Display Failure: The display unit might have encountered a problem, such as a burnt-out backlight or a faulty connection. As a result, it cannot show any information even if the buttons are working.
Software Glitch: In some cases, a software glitch or error could cause the display to stop functioning correctly. This could be due to a power surge, electrical interference, or other unforeseen issues.
Worn Out or Stuck Membrane Switches: The non-functional buttons on the keypad may have worn out over time or become stuck, preventing them from registering when pressed.
To troubleshoot and fix the issue, consider trying the following steps:
Power Cycle: Unplug the microwave from the power source for a few minutes, then plug it back in and see if the display and other buttons start functioning normally.
Check the Control Panel: Inspect the control panel for any physical damage or debris that might be affecting its functionality. Clean the panel gently with a soft, dry cloth to remove any dirt or residue that could be causing the issue.
Button Testing: If you have the technical knowledge and the right tools, you can perform a button test to see if the non-responsive buttons are registering when pressed. This might help identify if the issue is with the buttons themselves.
Contact Customer Support: If the problem persists, consider contacting Sylvania customer support or a professional technician for assistance. They can help diagnose and repair the specific issue with your microwave.
Remember, when dealing with electrical appliances, safety should be a top priority. If you are not comfortable troubleshooting or repairing the microwave yourself, it's best to seek help from a qualified professional. Additionally, if the microwave is very old or the repair cost is too high, it might be more practical to replace the microwave with a new one.