W880i Service menu Test 1

Hi everyone! I just joined this forum recently, could anyone help me with a problem I have with my Sony Ericsson software information R8BB001. Thanks.
W880i The service menu Test 1 says now:

Connect: Key Error
CMLA: No Key
SEMC: Key Ok
VIA: No Key

Why do I get this error? What does it mean?

What were you trying to do? Is the phone working?

Thanks for answering. When I turn the phone on it shows a full signal that vanishes after a minute or so. It says that its 'Searching' and then after that it says 'No network coverage'.