Why can't I acquire satellite signals

"It's not the kind of thing you just acquire...they're very expensive.

I've heard that as the battery wears out they have trouble acquiring satellites, the battery is soldered in. If you want to attempt this, here is a link to a video demonstration:

How to Replace Your Garmin Street Pilot c320 Battery

You can buy a battery here for £7.21 - Buy Battery

You could also try a hard reset:

To reset the c320:

1. Place your thumb nail in the groove located under the Garmin logo on the face plate.

2. Gently pull off the face plate.

3. Press the Reset button.

4. Turn the unit back on; it will operate normally."