No audio core after installing Maverics

After upgrading to maverics, my core audio soundcard stopped working. When I checked in "about this mac" it is present, computer starts with start up sound, but when I go to preferences/audio I only have digital out. This is quite frustrating as I need to edit videos!
Anyone can help?
I've tried fiddling with headphones input, as some users suggested, no luck.

Hey there RadBuda,
It sounds like you are unable to get audio on your iMac when you log into your account after installing Mavericks, but you do hear the startup chime when you turn the computer on. I would start by resetting your SMC:
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
From: Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/ht3964
Then reset your PRAM with this article and re test the issue:
Shut down your Mac.
Locate the following keys on the keyboard: Option, Command (⌘), P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on your Mac.
Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the gray screen appears.Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.
Release the keys.
Resetting PRAM may change some system settings and preferences. Use System Preferences to restore your settings.
From: OS X Mavericks: Reset your computer’s PRAM
http://support.apple.com/kb/ph14222
Thank you for using Apple Support Communities.
Regards,
Sterling

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