Isn't HDMI digital and RCA analog ? From eBay ad
This cable functions as a signal transmitter, but NOT a signal converter. As HDMI carries digital signals while RCA carries analog signals. In order for these two formats of signal to communicate with each other, both input and output devices needs to support the signal conversion function (code and decode), please kindly check with your user manual. If both input / output device do not support signal conversion, a signal conversion box is required.
To use this cable, your display must be a high definition display.
The cable doesn't own the chip to convert digital signals to analog signals, so it only fits for the devices which itself can convert digital signals to analog signals, this product is the Component Adapter Cable only!
The convertor is not included!! To achieve high definition please cooperate with converter or TV, computer graphics itself has a decoder To support
The OP said it is an old TV . . .
