It is very difficult for anyone on this particular forum to diagnose any such problems with said product due to the main fact that this forum is dedicated to the theories and practices of integration of such equiptment that utillizes computer components as a means in alternative to the conventional car audio equiptment. Although, this "Sub-Forum" is titled "Car Audio," on occasion we here do share knowledge on installation practices on general car electronics, it is still geared towards the integration of a funtioning CARPC with the vehicle's audio equiptment.
If you would like to inquire or have the ambition to achieve such a task with a CARPC, then welcome. I hope we can assist you further.
Otherwise you may have better luck searching elsewhere that is not as focused or specific on a particular project such as CARPCs and you could look into other websites that are more generalized in car audio electronics. Other places you can look woud be the Manufacturer of said product and may have assistance through their website, a form of tech support they may provide, and/or a authorized service center.
Here are a few websites that may be of use to you due to the fact that they are general car electronics websites that are not specific to CARPCs:
http://www.elitecaraudio.com
http://www.carsound.com
http://www.caraudioforum.com
http://forum.sounddomain.com
http://www.realcaraudio.com
http://www.carstereo.com
http://www.caraudiomag.com
http://www.termpro.com
http://www.the12volt.com
http://www.talkaudio.co.uk
http://www.caraudiosecurity.com
I'm sure there are many more but this may give you a start. You may even receive a quicker and more knowledgable response of said problem.
Good luck.