The cheapest way to do hdmi to RCA is one of the generic hdmi to VGA adapters on ebay or one of the chinese marketplaces (like this one. HDMI goes in, and you've got a 3.5mm audio output.

so all you have to do is convert the RCA signal to VGA. To convert the signal, you must use a VGA box. How to Get HP Toolbox FX. HP Toolbox FX is a program that provides maintenance, servicing ...