I have a GO920 and my friend has a GO720, both running version 9.702 Truck software. I've substituted the 9.541 bin folder but the fix only works if I do a reset before switching the devices on. If I switch them off then on again without a reset it finds the satellites but won't lock on no matter how long I leave it. However it works fine with the 9.541 software so I presume that substituting the file(s) in the bin folder is only part of the solution on some devices. We use the these when we're caravanning so need to use the truck software. Is there likely to be an update for the 9.702 truck software to fix this. Has anyone any suggestions.