I have a Seagate external hard drive 1500 Gbytes and it used to be in a case. The other day I noticed the power button wouldn't come on, even after switching cables etc. So I removed it from the case and tried to hook it up to my computer. After I hooked it up I noticed my computer wouldn't turn on. So I removed the drive and my computer came back on. So I tried another computer same thing. Ok so today tried it with a docking station and again while the harddrive is connected the power will not come on but as soon as I take it out the power on the dock returns. What could be the issue?