In my case, the problem was not caused by the USB host cable aka mini USB-A. I have been using the GoldX 5-in-1, Avico and iRiver cables without problems. The problem that killed my Z was the USB mini-B cable aka USB sync cable that you use to transfer files between PC/Laptop withZaurus, ie the cable you would use with IntelliSync. I don't use it much since I use my wifi and samba to transfer files most the time, but this time I wanted to copy files to my 4GB CF card which would not work with a CF wifi inserted so I tried the USB sync cable. I must have grabbed a dodgy one though. I have so many USB mini B cables lying around since most devices you buy these days come with one, ie camera, disk, hub, cdrom, mobile - all the miniature devices these days provide a USB mini B cable for synching. Unlucky for me, I grabbed a dodgy one. I will label each cable from now on, ie I will label the one provided by Sharp with a Zaurus tag and only use that cable to sync the Z if ever.