Updating a tomtom go 730

Im going to try this again if i can get a little help. I have a 730 go with updated map North_America_P_865_3254 which navecore goes with this? Right now i have navecore 9058a . The tomtom will not work in tomtom home also voice does not work. I would like to start over can someone tell me how to do this Btw the way im a total newbie at this tomtom stuff i do have my original map but thats it...... the rest of the files are gone is there a way to update this TT on my own without the original files? Thanks in advance........

Check our tutorials for godd informations.
Update you TT with Home to the official 8.351 Navcore and add your map.
Since you said the map is original it will work.
Otherwise use the 9.004 or 9.205 ,the last should be available for automatic installation as well.
Use FastActivate for your patching and activation needs.