It is nigh impossible to say from afar without having the device with me what exactly is wrong. The only advice anyone could give is the way one would debug it having access to the device;

• check all logs and dmesg
• take a listing of all installed packages and compare existance and version to a known good device
• check relevant init and config files
• start the appliction under trace and see what calls fail
• etc. etc...

There are many ways to check what is going wrong but it all depends... you are the only one who can do it, unless you allow remote shell access for somebody to check it.