First, check what has stopped working
Try a different small device you know works. If only one appliance fails, the appliance may be the problem. Notice whether nearby outlets or lights are also out; that detail helps when you describe the issue. Do not remove an outlet cover or touch wiring to investigate.
Look for a tripped GFCI or breaker
Some outlets are protected by a GFCI receptacle in another part of the room. If everything is dry, there are no signs of heat or damage, and you can identify the correct device, follow its labeled reset instructions. A breaker that trips again or a GFCI that will not stay reset needs professional troubleshooting. Do not repeatedly reset it to keep the circuit running.
Know when to stop
Warm or discolored outlets, buzzing or crackling, a burning smell, sparks, a shock or tingling sensation, and flickering lights warrant prompt evaluation. If there is smoke or active fire, leave the area and call emergency services. Electrical Safety Foundation International lists these as warning signs of electrical trouble.
What to tell the electrician
Note the affected room, whether other devices are out, when it started, and any smell, heat, noise, or repeated tripping. Photos taken from a safe distance can help. Tell us if it is affecting a business operation so we can coordinate the right trade promptly.
Technical reference: Electrical Safety Foundation International: electrical warning signs ↗