System Software Missing
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 17 years
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Don't know if anyone else had this problem and the fix but thought it would good to post.
I recently updated my 660 to the latest software, 4.20. When I turned on the unit I got the splash screen with a message saying System Software Missing. After picking my heart up off the floor, I started trouble shooting. Tried soft and hard resets, no good. Connected to PC, unit not seen. What finally saved my butt was when I started searching the User Guide. I mistakenly opened the guide for the 680 and without realizing it used the 680's method for recalibration (Press and hold POWER button for about one minute). I didn't get the calibration screen, instead got a series of messages saying something about software reloading. I continued holding the POWER button until no further messages were seen. Released button and unit powered up normally!!
And this is why we back our
And this is why we back our units up to a computer. Did you lose any user data?
Newest to oldest... Nüvi 660, Street Pilot 2720, Magellan SporTrak Pro, Lowrance Global Map 100
Didn't Lose Any Data
No data loss. I had back up but the unit wasn't recognized by the PC. After the "fix", everything was there including the new update.
Bob: My toys: Nüvi 1390T, Droid X2, Nook Color (rooted), Motorola Xoom, Kindle 2, a Yo-Yo and a Slinky. Gotta have toys.