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  1. #1
    Aut Vincere Aut Mori Snuffleupagus's Avatar
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    Problem with PowerTap Pro Computer Going into HOST

    X-Post from Road Cycling where my little dilema is rapidly descending off the page...

    After taking the bike apart to clean it, and do some maintainence I went to reinstall my PowerTap Pro. I changed the cable routing, I've had it wrapped around my top tube for the last ~2000 miles/2 months. This time, I ran it under the top tube and wrapped it around the shifter cable before securing it to the stem. It didn't work - it wouldn't pick up the signal from the hub. Following the suggestion of a mechanic from the LBS I removed the cable ties securing the wire to the frame (as he'd said if they were too tight they could cause interference).

    So now, the computer will read from the hub for a minute or so - and then go into HOST mode, as if I've docked it to my computer. I've checked the cable, and it isn't cut/broken. At the point where the cable goes into the head unit though, the outer black cover is partially pulled away revealing about .5mm of the inner cables, althought not down to the metal of the wires. I have the sensor (the new shark fin type) in the proper place.

    What - the - heck? It's gonna make my cranky to have to possibly warranty out this nearly new product. On the other hand, it's probably not altogether bad to take a week off watching my power numbers like an addict.

  2. #2
    Senior Member Snicklefritz's Avatar
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    So you are saying that there is some exposed wire near the end where the computer sits in the mount that goes on the stem?

    I had a somewhat related problem a few months ago where I changed the batteries and then afterwards I couldn't pick up a signal. I ended up taking my bike to a friend's place and we put my wheel on their bike, their computer on my setup, yada-yada, various combinations...


    turned out it was a bad sensor unit and I sent it back and got a new one under warranty. Saris is really good about that. The friend that helped me out said that he also had a simialr problem with units just "going bad" for no apparent reason.

    In looking at mine, I couldn't find anything wrong with it. no exposed wires, no kinks. nothing. I have no idea why mine went bad. It's weird.

  3. #3
    Aut Vincere Aut Mori Snuffleupagus's Avatar
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    Ooops, yeah, I should have mentioned I changed the batteries in the hub too.

  4. #4
    Senior Member Ti-tillIdie's Avatar
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    I just started having this problem with my power tap today. Has anyone else experienced the head unit reading "host" when on the bike? What was the solution?

  5. #5
    The mods changed this... damocles1's Avatar
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    Mine did the same thing after @2000 miles. I called PT and we did some troubleshooting. Nothing worked.
    They sent me a new head immediately...before they even received my old one.

  6. #6
    部門ニ/自転車オタク NomadVW's Avatar
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    I've had it happen with wet/dirty sensors on the PT mount.
    Envision, Energize, Enable

  7. #7
    Aut Vincere Aut Mori Snuffleupagus's Avatar
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    The problem I had back in 06 when I made this post was solved by a new mount/sharkfin.

  8. #8
    Senior Member Ti-tillIdie's Avatar
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    great, thanks for the help. I think the sharkfin/sensor may be my problem since the head unit still works with the computer fine.

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