I purchased a CarPC system with the VoomPC-2 Case, but there is no sound coming from the rear audio jack?
The VoomPC-2 Case is supplied with a cable that swaps the rear audio jack to the front RCA audio jacks, therefore allowing easy connection to an amplifier or head unit. If you do not want to connect the sound through the front RCA audio jacks, and want to swap it back to the rear audio mini-jack, then you must open the case to disconnect the supplied cable. By doing so you will be disabling the front RCA to enable the rear audio mini-jack. Here is a visual representation of how it looks before and after on the motherboard.