Hi. Please help: my Iomga 2TB external (USB) drive is not recognized by disc manager and is making no sound, and no vibration. It has two cables: power (with a brick at the end) and USB data cable. One day it just wouldn't come up, no sound, no vibration, only the blue power light. Iomga sent me new cables, which didn't help. Have tried in Windows 7 and XP. Once Windows 7 disc mgr did see it and wanted to format it (which I didn't do), and never since then has it been seen at all. I foolishly have no backup for most of what is on this drive. I tried tapping it lightly while disconnected--didn't work.