fellow axim owners, let me make you the happiest people on the planet!
I had the same problem, so I found this forum and saw that it wasn't just me...my warranty was also up. I chatted with dell, they gave me the "its out of warranty, buy a new one" crap, so I said screw it and I threw it in my drawer until I remembered it today...
So I open the axim and find it to be very dusty...i blow the dust off and I see this one golden cable is loose...so I put it back and place and TADA...it worked!
check out my flickr page for a picture [with notes]. thank you people for helping me figure this out so i can help you fix yours! [did that make any sense?
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http://www.flickr.com/photos/trvr3307/21796255/