Which one do you have? The parallel port unit or the USB unit? How is it powered, I am guessing an external wall wart 5vdc at 1 amp or so? Most of those ZIP drives just went click,click,click,......... when they died. Sadly I sold my external ZIP250 drive and the only one I still own is a ZIP100 internal drive that I have mounted into a removable hard drive caddy. Maybe your wall wart power pack is dead or has a bad power lead. Can you check voltage on the ZIP250 control board?