HT3964 Had a power outage. My iMac comes on but screen is black. How do I get the screen to light up again?

Had a power outage and my iMac is on but the screen is black. How do I get it to light up again?

Your system may have suffered hardware damage if not connected to a UPS  (Universal Power Supply), you can try doing a SMC reset, please click iMac SMC and PRAM reset for instructions. If that does not work make an appointment at your local Apple Store or AASP. BTW you can find UPS's at your local office supply store.

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