Quote Originally Posted by marksu View Post
One more thing... the device is so stuck on the logo screen that it can't be turned off... pressing power button doesn't do anything So I have opened the device and I disconnect the battery to turn the device off.
Quote Originally Posted by Neil View Post
That's unnecessary. Hold the power button down to force it off. Many devices need it held for >30 seconds.
I can confirm this. I unbricked a nüvi 765 earlier this week that was stuck on the Garmin splash screen. Had to slide the power button to 'OFF' unusually long to finally get it to power down. The 30 seconds mentioned by Neil are a fair indication as to how long could be required.