got some friends coming over tonight who are having sat nav problems - i don’t know anything about sat navs but they seem to think i can sort it because I know how to use a computer!!
don’t know the make or model, but guessing it will be entry level stuff!
is there something obvious they should have done when setting it up ? can anyone point me towards an idiots guide to sat nav 
the only thing i can find on t’internet is a halfrauds bluffers guide which is fairly useless 
TIA