Powertap questions

[Spartan SL]

My Powertap hub stopped transmitting/working 2 weeks ago. I tried everything to get it going again. Funny thing is, at the same time my HR strap stopped working as well. I opened the HR strap up and found that the battery had leaked and most likely had destroyed the electronics. I purchased a new HR strap but I couldn't link it to the CPU. Eventually we (the CT dealer and I) decided that the CPU was faulty. I replaced it, linked the HR strap, but still no luck with the hub. The dealer made me change the batteries in the hub again, specifying Energizers. But again nothing. I went for a ride yesterday, using the CPU and HR strap. I punctured, changed the tube, and lo and behold, my watts appeared again. I can only put it down to how the hub was seated. Can anyone shed more light on this for me.