Hi,
I have a Garmin 176c, and the top third of the display is missing (like the image moved off the top of the screen).
Below the bottom of the image, which is moved one third of the way up the screen, is an upside down, inverted image of the bottom third of the display above it. I has a different color as well, but is an upside down, mirror image, going down to the bottom of the display.
I know that's a confusing description, but any advice is appreciated.
Garmin will no longer service this unit, so I'm willing to try anything.
Thanks! Tony