I have tried both method. One using the Alcinject and AppleHDA kext. and also tried the kext by tmongolk in posted insanely mac. I also tried Targu method using the AppleHdaPatcher.

I am able to get sound coming out from the internal speaker if I select the output source as internal speaker. However, i am not getting any sound on the HDMI when selecting digital output.

Any ideas?

Thanks,