Coffee maker does not power on at all; no lights or display on Oster digital coffee maker.

Safety first: Unplug the coffee maker before any inspection. Do not attempt repairs if you are not comfortable working around mains voltage components.

Basic checks:

• Verify the outlet is working by plugging in another appliance.
• Check that any GFCI or breaker has not tripped.
• Inspect the power cord for cuts, kinks, or burn marks.

Internal fuse and wiring (advanced):

• Remove the bottom cover to access the power input board or wiring.
• Locate the inline fuse or board-mounted fuse near where the cord enters.
• Test the fuse with a multimeter for continuity. Replace only with the same type and rating if blown.
• Inspect connections to the on/off switch and control board for loose or burnt terminals.

If the fuse is intact and power still does not reach the control board, the control board or power cord may need replacement. For safety, many users should seek professional service at this stage.