Hello DJ FinalKuts
Reset the SMC (System Management Controller) >
http://support.apple.com/kb/HT3964
+1. Shut down the computer.+
+2. Unplug the computer's power cord.+
+3. Press and hold the power button for 5 seconds.+
+4. Release the power button.+
+5. Attach the computers power cable.+
+6. Press the power button to turn on the computer.+
Then restart resetting the PRAM >
http://support.apple.com/kb/HT1379
+Restart holding the Command-Option-P-R keys before the gray screen appears and hold the keys down until the computer restarts and you hear the startup sound for the second time.+
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Then if the iMac refuses to startup properly it's likely a hardware problem and you will need to contact Apple Support. >
http://www.apple.com/support/contact/
Dennis