OK, do you have a SW.UNL file? This made by generating a 25 character code from the gen using you card id. Copy and paste the code into notepad, select save file type as "All files" and save it as "SW.UNL" (no "'s). Copy it to the "E:\Garmin\" directory. This will allow your internal GPS to be used.
As for GPS signal, to be truthful, its sh***! You can only really get one on a good clear day while outside or near a window. I would just invest in an external GPS receiver which can be used with future phones without AGPS. You can pick up a decent 52 channel one for around £30. Once you do get locked on however, with or without an external BT one, Garmin works really well.
As for the white map, this is because you have not installed you maps and base map correctly. Copy ALL maps to the "E:\Garmin\" directory. Maps end with the ".IMG" extension. To unlock the map, it must be sent over with mapsoure to unlocked using a code from the gen with the correct map id (278 i think for Europe/UK 2009, 196 for Europe/UK 2008) and place the 25 character code into "GMAPSUPP.UNL", saved in the same way as "SW.UNL" and place in the "E:\Garmin\" directory. For more than 1 map, call them "GMAPSUPP.IMG", "GMAPSUP1.IMG", "GMAPSUP2.IMG" etc. etc., same with the ".UNL" file for them.
And is the TOPO map in a zip/rar archive? If so, extract it and copy to the "E:\Garmin\" directory.
Lookey here mate :
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Was posted on page 1 and you could have searched :p
Hope this gets you sorted, if not, post again!
Mnia786