Hello Susan, my name is ***** ***** I will do my best to assist you.
Im sorry to hear about the bad luck youve had. Lets try to get the device working again.
For starters, make sure the SD card is removed.
Then, connect the device to your computer via its usb cord.
Then, hold the lower right corner of the touchscreen with your finger, and then press and hold the power button. Keep holding your finger on the screen.
Release the power button after about 7-10 seconds.
Do you see anything at all showing on the garmin screen now?
Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.