After I upgrade maverick my display will suddenly shut off but my sounds is still working. Need help

After I upgrade maverick my display will suddenly shut off but my sounds is still working. Need help on this? Thank you

Hello rodamitjr,
It sounds like your iMac display will turn off unexpectedly, but you can tell the computer is still on because you hear audio.
I found an article with steps to troubleshoot issues with displays.  This article is for internal and external displays, so you can skip any steps referring to an external display.  I recommend reviewing the full article, but this step specifically stands out to me for the issue you described:
Reset the system
You can reset the Mac's parameter RAM and SMC.
You can find the full article here:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Thank you for posting in the Apple Support Communities.
Best,
Sheila M.

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