Today I went to turn on my st1 and nothing happened on display. I then tried replacing battery in display and it turned on with the no batt message. I have two batteries I know are good and charge up fine. I checked for loose connections but I don't think I found any. I tried a few times replacing batteries a few times but with no change same no batt message. The backlight did not light up either. Then I tried pedaling bike and display went erratic with light flashing numbers all over the place and it shutting off. Please tell me I just need a new display.