300 dead battery or operating software messed up??

[Kegan36604]

My 300 loses power the instant external power is removed. It is as if it has no battery life whatsoever.

Here is the back story - I loaned my car and when I got it back I found the person left the TomTom plugged in for a week to the CLA (power being supplied even with the key removed).. Upon booting it up, it would go into "shutting down in 10 seconds" mode, then start a moment or two later, then back into "shutting down" mode again - over and over. TomTom had me do a Factory Reset, which corrected this problem. However my no power buit external power problem remains. Unfortunately I didn't discover that till after I got off the phone with them.

It would appear that the internal battery is dead as a doornail, but I suspect it is something else going on. Any suggestions?

 

[dhn]

Besides the factory reset, try a reset on the unit itself (not sure whether your model has a reset hole in the bottom or whether you need to hold the power button for about 20 seconds).

Also, try the Clear Flash tool found here.