PC into TV - A/V

[GBH14]

I have a PC with Displayport (DP not DP++) and VGA outs, and a 3.5mm audio out.

I want to display A/V onto my TV which has HDMI in, VGA in, component in and 3.5mm audio in.

I currently have it on VGA and 3.5mm audio which works fine but the quality is s**t. So my question is how do I get it working through the HDMI in on my TV?

I have a DP to HDMI cable which works fine for the display but has no audio, maybe because i need DP++?? I also cant seem to set the TV to take a seperate sound source when using a HDMI input.

How else can I get this to work? A new graphics card isnt an option due to it being a tiny PC with no expansion slots. Is there such thing as an external USB graphics adapter that could do what im after?

any suggestions?
Thanks

 

[JonnyK]

your display port and vga can't output sound. get a better sound card and plug in to surround sound unit?

 

[Eliganza]

Doubt you'd be able to do this without a new graphics card.

 

[KDF]

You have 3 options

1) Some telly's have 3.5mm in jack. If it does just use a 3.5mm stereo male to 3.5mm stereo male cable.
2) Buy a new graphics card with HDMI outputs
3) Buy a conversion box - hard to come by and probably more expensive than option 2.