Bella air fryer does not power on at all (no lights, no beeps).

Safety first: Unplug the air fryer before any inspection. If you smell burning or see melted plastic, do not attempt to power it again until inspected.

External checks:

• Confirm the outlet works by plugging in another appliance.
• Ensure the Bella air fryer is plugged directly into the wall, not a faulty power strip.
• Check the power cord for cuts, kinks, or burn marks.

Internal checks:

• Remove the rear or bottom cover to access the power cord terminals and control board.
• Verify that the cord wires are securely attached to the input terminals and not loose.
• Locate the internal fuse on the control PCB (often a small glass or ceramic fuse). Test it with a multimeter for continuity; replace it with the same rating if blown.
• If the fuse blows again immediately, there is likely a shorted component on the board or heater circuit; further diagnosis or board replacement is needed.

If the fuse and cord are good but the unit remains dead, the main control PCB power supply has likely failed and the board should be replaced.