I had just got done cleaning the spokes on my Trek 7.6, '09 vintage when I noticed the computer, a Bontrager node 1.1 was not working. Not being much of a computer guy and with the LBS near, I thought I would let them work their magic.
Well, they said my batteries in my fork sensor needed replaced. O.K. I got that taken care of. No pairing occurring! Maybe I had the batteries in wrong? Checked and rechecked. Still nothing. Called the Trek gurus themselves and confirmed batteries go in positive side up. Got it. Still a no go. Last but not least, the magnet. Cleaned it off with glass cleaner and turned it around and boom! Success! Just a little heads up if you are struggling with pairing your unit.