The microwave does not start; the display works, but cooking will not begin when pressing Start. Sometimes a brief click is heard, and then nothing.

Safety first: Unplug the microwave from the main power supply. Microwaves contain high-voltage components that can retain a dangerous electrical charge even when unplugged. Do not touch the high-voltage capacitor or the magnetron area unless you are trained.

Basic checks (user level):

• Open and close the door firmly several times to ensure the latches engage correctly.
• Inspect the door for visible damage or sagging hinges that might prevent proper closure.
• Check that no food debris or warped containers are obstructing the door frame or latch area.

Technical checks (technician level):

• Remove the outer cabinet (after unplugging the unit) and locate the door interlock switches on the latch bracket.
• Using a multimeter, test the primary, secondary, and monitor switches for correct continuity according to their Normally Open (NO) / Normally Closed (NC) configuration when the door is opened or closed.
• Replace any switch that shows an open circuit when it should be closed, or vice versa, or has intermittent readings when the actuator is pressed.
• Inspect the plastic latch hooks on the door and the latch bracket for cracks or misalignment; replace them if worn or broken.

If you are not experienced with microwave repair, contact an authorized Balay service technician, as incorrect work on the safety interlock system can be hazardous.