Coffee maker does not power on at all, no lights or display, even when plugged into a working outlet.

Safety first: Unplug the coffee maker before any disassembly. Do not attempt repairs if you are unfamiliar with mains voltage safety.

• Verify outlet: Test the outlet with another device. Reset any tripped breaker or GFCI.
• Inspect power cord: Look for cuts, fraying, or crushed sections. If damaged, the cord must be replaced; do not tape or splice it.
• Check power switch: Ensure the power button is fully pressed and not stuck. On rocker-switch models, toggle it several times.
• Internal fuse (advanced): Remove the bottom cover (unplugged) and locate the internal fuse. Replace only with the same rating if blown. If it blows again, there is likely a shorted heater or board.

If the unit remains dead after fuse and cord checks, the control board or heater circuit may be open and should be diagnosed by a technician.