After connecting the PC to your TV with the HDMI cable it is possible that some sounds (button press and coin) are not played on the TV.
This is because your PC need to open an audio connection to the TV every time and it is slow.
To solve this problem, please install this tool:avrag_setup.exe.
Visit this page for more info: http://www.marcsapps.co.uk/.
You need to open this tool every time you start the game!