I think the wisdom of one user stated it very clear from another thread.When you start playing with the files sooner or later you will have a problem.It will take 30 - 45 minutes or so, but as you can see, it's worth it. Before deleting or otherwise manipulating ANY files on your Garmin unit, BE SURE that you know exactly what those files are.
There's quite a few Nüvi 7xx owners complaining of the same symptoms as well Hi All, I used the Web Updater to update my Nuvi750 from Ver2.50 to 2.60.
When finished I couldn't boot up because it said SYSTEM FILES MISSING.
I called Garmin Tech support and they asked if I had hi-speed internet ( I DO) they then had me go to a website , there they then gave me a code to put into my pc and connected my computer to theirs. The tech support then proceded to fix my Nuvi over the inernet.
He took out some files added some files in my Nuvi and then updated my nuvi to 2.60 and every thing works great now.
you surmised, no disc came with the 250w and now I find that that is where i would look for Map Source and a possible repair.
I have deleted the new POI's but that didn't help..thanks for the suggestion though.The link you provided, I've already been to..help either. A lot of people including me have gotten the disk for free so I would not give up on the first try. Enter your 25 digit unlock code (without the hyphens) in this file and reboot. If it doesn't - it would because either a) the code's wrong or b) the map file is not called GMAPPROM. UNL file in situ and stopped doing it for some reason.I guess I'll be talking to Garmin begging for a disc. It may be a little hard for you because according to your post you have had the unit more then a year. IMG (potentially it could be GMAPPROM1, or even GMAPSUPP - in which case the . Try that and report back With your nuvi connected to your computer with the USB cable, can you confirm the presence of the following files on your nuvi? - this is your basemap - this is your preloaded detail maps - this is a supplemental map file The simple act of loading POIs would not have deleted your maps. (My original C510 came with one and its replacement didn't).Something obviously went bad during the removal of the extra POI's which were inserted for a recent one time trip to Pheonix.Guess I'll hope Tech Support can reload those remotely as Hannah has suggested. Well, since you seem to be missing the file which is the pre-installed detail map file and since you don't have a backup file, Tech Support is your only option.This is something that the user does, albeit most likely inadvertently.