I have a 160GB drive that came in with a blown board, and the drive does not spin up at all. Now I've had these come in before and I've been lucky enough to find an exact match board. However, with this one, it's proving to be difficult at best to find the firmware revision needed 3.AAJ.

Does anyone here know what diode or board component typically blows out on these boards? I'd rather just go through and trouble shoot the board first, instead of killing myself trying to find firmware matches. If there is a common point of failure with these drives I'd like to try and find out what that is. Thanks in advance for any help you can give.

Greg

There are 2 to 4 parts of interest. Two are the TVS protection devices (One for +5V, and one for +12V). These are usually black, big rectangles with connections on each end, and will be located close to the power connector. These usually short when they go bad. There may also be fuses, or 0 Ohm jumpers nearby. These will be shorted when good, and open when bad. As a quick test, when powered, you should measure 5 or 12 volts on both ends of the 0 Ohm jumpers.

It's been mentioned here many times what to do if these parts fail.

when the tvs protection devices aka fuse has not blown at all

it still damaged the board and allso the preamp head
i suppose its gettting a bigger wack in voltage so it fails to protect the board.

but most problems i had is seagate damaged ic chip on the head




this is what your looking for

http://delta.octopart.com/STMicroelectr ... 6V1SC6.jpg