I use a Cateye double wireless CD300DW. I took my bike out for a ride in the cold and lost some functions - clock slowed down, etc.
Batteries were new. I tried a reset to change the time, and found that I could not synch the computer with the sensor. Replaced all 4 batteries, and tried all kinds of sequences to get them to synch - no luck. I followed the instruction manual to the letter.

What happens is you push reset on the computer and after the initial display, it blinks "Synch ID". At that point, you're supposed to push reset on the sensor with the computer in range, and the computer is supposed to pick up the sensor ID. All it does is continue to blink until it times out.

Does anybody have any suggestions?
Thanks!