I have a Western Digital 160Gb Harddrive. WD1600JB. It started displaying messages when booting up that an imminent hard drive failure was near. This came up a couple of times and then it quit booting up all together. I could not get the drive to do anything at all. I removed the drive and installed a new harddrive and connected the old one as a slave. The computer does not see or display the old drive at all. I took it from this computer and connected it to an external harddrive enclosure that connects with a USB connection. The drive still does not show up at all. I did notice however that in the device manager of the control panel it shows the drive on the USB port, but I cannot get to it. Sometimes when I have the drive connected and turned on, the computer will sort of lock up. When I turn off the power to the external drive enclosure, it frees it up and the computer will work fine. The drive does not make any weird noises and it sounds like it still spins. I do not see any visible damage to the PCB. I removed the back of the drive momentarily and I do not see any damage to the platters. The read heads were all the way into the center. I put the back back on and tried it again but it still does not work. I would appreciate any suggestions or help on this. I thought it sounded like a defective PCB but am not sure. I have some photos that I would like to recover.