Navman F20 GPS Receiver "8080" Questions

I think. When I turn it on, make a bip and flash, and the screen remains black. The GPS is a "PANDA 8080 GPS". Might have to get a new battery for the inside too, if this is a new issue

...the settings below GPRS Settings: Primary IP address:

 216.155.165.050 Port: 8080 Secondary IP address:

 Blank APN name: 

 ...

...Data Account: "Sun MMS" Connection Type: "HTTP" Proxy Address: "202.138.159.078" Proxy Port: "8080" Select Activate Profile, Yes to activate profile Setup/Enable WAP Go to Menu -> Services ...