After the service of my Acer N35 (connector was broken) the builtin GPS was not working. So i brought it back to Acer and they changed the antenna. I got it back and ... it was not working again.... the answer on the support-line was i shall bring it to them.

After consulting the Internet (RTFM) and a friend of mine the solution was to set the clock. After the standard-Reset the clock was reset to xx.xx.2004 and GPS needs to know the correct date and time to determine the correct sateliltes.....