Constantly saying "Waiting for a valid GPS signal

TomTom just released a firmware update to fix this. It can be installed via MyTomTom. See post at bottom of the page in the link below:

http://discussions.tomtom.com/t5/Built-in-car-navigation/Sony-XNV-770BT-GPS-issues-anyone-else/td-p/18987/page/7

Usually, when it's waiting to get a valid GPS signal, it is "listening" (scanning) for satellite signals to establish your current location. If you are in the open outdoors, i.e. not inside a building or under extended covers, it should get the satellite signals within a minute or so.

A couple solutions:

1) Make sure the TomTom can "see" the sky well... the GPS satellite waves are rather weak and easily blocked by trees, and anything not a window.

2) Hook up your TomTom to the computer (see details at www.tomtom.com or in the manual)

2b) Do a "sync" and download all updates. One of the updates is a small file that tells the TomTom where the satellites are located this week, and helps it sync up much faster. The longer time between uses, the longer it takes TomTom to find the satellites, and that can takes up to 2-5 minutes sometimes.

That can be frustrating with a car full of people waiting to get going and the driver doesn't want to drive without making sure the TomTom works and is giving valid directions.

The GPS needs at least 3 satellite signals to operate.You are probably in a bad reception area. Move around a bit and try again until you see a signal array of 3 or more!

my tomtom wont get a signal and is saying are you in a building?

check the port is set to 8
not sure if your model has GPS search wher it finds the port and vbaude automativcally, if it does use it and see if that fixes it if not
your battery is too low
you have a damaged SIIRF chip and that is expensive to repair

Go to TomTom Home on your computer and do a update for your unit. In the update list you should see a GPS quick fix which helps the TomTom's aquire a signal faster. Hope this helps.

press the reset button on the side and wait for about 3minutes...

the unit will only connect with the satelites out doors my man

no gps signal