Cadence sensor dead after changing battery

Question

Put in a new battery and now won't work at all. Speed sensor is fine after battery change. Checked with a different battery, nothing. Did the flip battery and left open just in case this would work. The white card fell out - does it have to put back in a specific position?

Former Member · Answer

This worked for me !! Thank you !!

7719191 · Answer

does the led flash green upon battery replacement in the sensor? If not it's not powered - check the alignment of the metal piece in the removable battery cap - it has a long rectangular piece which rises to the top of the cap (when turned upside down) and this is what makes contact between the + battery terminal of the sensor and the battery holder (metal piece inside the cap). The metal piece in the cap can become rotated out of alignment with the pickups in the body of the sensor - when this happens the + side no longer makes contact and the sensor won't be powered. Took me :45 minutes and finding this thread to fix it...

9196016 · Answer

yep worked for me, there is a little bronze tab on the device itself, you can see it has a little point on it, make sure to bend this up as far as it can go (meaning pull it towards you away from the device). This will then make contact with the silver metal on the battery tray.

jtgumley · Answer

This worked for me now too!! I almost have up trying. Bent that bronze part up a bit and firm pressure when I closed it all up and it connected.

Former Member · Answer

Yes. You have to be very careful not to damage the small side connector when inserting the battery. I was too clumsy and the battery no longer made contact with this connector. I tried using fine nosed pliers to bend the connector back into position but it was so stiff to move that I thought it would break. In the end I used a small soldering iron to add a small sliver of solder to bring the connector sufficiently close to the battery and problem was solved. It was a very difficult and fidly process. Garmin need to redesign the battery compartment to get round this problem.

Former Member · Answer

Thanks worked for me after wasting time changing batteries numerous times. The paper insert came out and I put it back in the wrong position. The correct position is where there is a small insert cut into the side of the lid which ensures the large upper connector hits the small bronze hub on the sensor. Once I understood this it worked immediately.

Damo-bianchi · Answer

Use a small precision screwdriver to prise up the smaller rectangular shaped connector. Tried three times before the sensor would reconnect with the head device. Thanks to BLee for the tip.

1584997 · Answer

Fixed my issue! Thank you SO much!

Cadence sensor dead after changing battery

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