Titan won't sync to PC

[teamgood]

My Titan quit syncing with my PC yesterday for seemingly no reason. I've searched and found a few suggestions but no luck.
i've tried:
1. unchecking advanced network in USB-PC connection settings
2. deleting partnerships within activesync to try to create new one
3. have tried different cables and on my XP machine as well as Vista with WMDC.
4. doesn't appear that any pins are bent or broken or dusty, etc.
5. I've done a couple hard resets and no luck - and now no data as i can't resync

My guess is that its something with the phone since no computer even recognizes it. It just starts charging but gives no indication otherwise that the PC knows its there. All was working fine until yesterday.

Help please! Thanks!