I just purchased an Ideapad U530 Touch with Windows 8.1. It's a nice laptop, however, I can no longer do HDMI cleanly with my Samsung TV. My other laptop which used the same HDMI cable worked flawlessly with video and audio though.
A summary of what I've tried with HDMI cable attached:
Went to "Playback Devices". Couldn't find anything there but "Speakers (Realtek High Definition Audio)" and my Soundspot Bluetooth speaker. Also tried to show disabled devices - but nothing new popped up.
Went to Device Manager and noticed "High Definition Audio Device" with a warning that the "device could not start (Code 10)". Tried uninstalling the device and its driver as well as re-installing and scanning for device but with no success.
Tried switching HDMI cables with another one I know works. No luck.
Tried updating Realtek drivers with these but still no luck. No High Definition Audio devices appeared and still have that warning in Device Manager
Tried updating the Nvidia 730M drivers with the 3/10/2014 update. Not helping.
I noticed that I have two Display Adapters in the Device Manager - the Intel HD Graphics Family one and the Nvidia GeForce GT 730M driver.
The following step could address this:
Check that the HDMI output is connected directly to the Intel HD.
Uninstall Intel HD under Device Manager >> Control Panel>> Device Manager