In-built Audio device not found

Hi Guys,
My macbook pro suddenly finds no audio device inbuilt. And i can play no sound nor hear start up sound when switching on mac.
I get a 'no parking' like symbol beneath my audio options.
I've tried rebooting in safe mode, Resetting PRAM, Repairing permissions in disk utilities, use my ipod touch headsets, headphones.. NOthing worked.
And i'm feeling deaf whenever using Mac now.
Is there anyway to get the audio back ?
Thanks,
Raesh

Hmm.. Okay. Would give it a last try.
And I have a couple question before doing that..
1. I did the hardware test and It gave me this error .. " 4SNS/1/C0000008 :TPCD--24 "
    But When i looked up for this error, it tells me a sensor problem. Not as Audio device problem. Do you think this hardware error of 'sensor' has something to do with audio ?
2. So in-built speaker isn't working, plugging in headphones cable isn't working. But i was wondering whether a bluetooth speaker would be recoganised in the system preferences > audio output device ? Will it work ?
Because i keep on reading that an " in-built audio device not found " problem is a huge one and it costs a lot to repair. They often provide solution of changing the whole logic board (Keeping fingers crossed). And with my warranty period over, I don't wish to go through that path.  So want to know if external bluetooth speaker has a chance to get recoganised as an audio device, Then I would buy JBL bluetooth speakers. It seems good and less pricey than changing the whole logic board.
Let me know which way i can go, Thanks in Advance Man.
// Raesh.S

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