The power plug isn't fully seated. Pull the plug out and push it firmly back into the wall outlet. Check the plug and cord for damage or heat. Do not use a damaged cord.
If that didn't work, the internal fuse may have burned out. This requires service. Contact [email protected].
Heads up: Always plug it directly into a wall outlet, not a power strip shared with other appliances. Unplug it by gripping the plug, not pulling the cord.