Over Voltage damage to Lacie Mobile Hard drive F/W - USB. While connected via USB.
Hard drive Toshiba MK1646GSX.
Changed the hard drive board and tried the drive with the original Lacie board and again with a replacement USB caddy board. The NEW Toshiba HD was not an exact replacement although the correct model some of the details on the HD did not match ie WS 01 instead of UK 01
