Approximately how old is the machine?
Have you tried a few more power cycles?
Is there any response at all from the machine?
Can you hear any motor sounds when you try to turn it on?
Ok, then some electrical testing will be required to troubleshoot further.
A component on the power supply circuitry may have failed, possibly an electrolytic capacitor or a transformer.
Do you have a voltmeter available to carry out some tests?