Some suggestions:
1) Under Preferences-->Battery Savings, do you have it checked to turn off if external power is lost? If so, try unchecking it.
2) In other forums, I saw the same issue (unit turning off) discussed. There is some opinion there that the power supply isn't being shoved in completely into either the powerpoint or cigarette lighter as the case may be. Others there feel the power supply isn't quite as strong coming from the powerpoint as it is from the cigarette lighter and the unit, therefore, is not detecting the prper strength.
Finally, about the text to speech saying to turn right instead of left...is the direction on the unit showing to turn left? If so, that is very strange. Which TTS voice are you using, Susan_US or the male voice (Dan?). If that is the problem, try removing the voice from the unit using TTHome and reinstalling or switch to the other tts voice.
However, if the voice is saying to turn right AND so does the map direction, that is a different issue. In that case, you may want to try using Map Corrections to rectify the issue.
I'm 100% sure that both power connections are secure. If I change it over to the accessory power slot, I never get the problem. I just liked having the option of having the unit turn off, when I turned my jeep off.
I even disabled the option to have it turn the unit off when power is lost, and it was still trying to power down.
As per the text to speech issue let me clarify that a little better.
Last night as I was driving home the unit was verbally telling me to turn right. However when I looked at the display I was supposed to turn left.
This wasn't a case of it saying turn right, then you'll be turning left.
I'm using Susan English US. If there is a better voice recommendation that will allow for text to speech pleaser recommend it. But Susan is the only option I have for a computer generated voice.
It's my understanding I have to use a computer voice in order to get it to audibly announce the street names.
Right now I have installed:
Jane - English UK
Tim - English UK
Susan - English US - Computer
Mandy - English US
Lori - English US
Richard - English US
Thanks for the help.