03-16-2012 08:44 PM
03-16-2012 09:49 PM
Thanks! The 5 V TVS does seem to be a dead short right now. I will try removing it tomorrow.
Any chance you know what the specs are on the (I assume) ferrite beads on the power lines? Ideally, I'd like to replace the blown parts to bring the drive back up to spec, rather than, e.g., replacing the ferrite with a jumper.
03-17-2012 12:02 AM
03-17-2012 09:12 AM
Thanks! Removing the 5 V TVS diode did get the drive up and running. My only concern is that, if I install a new TVS but simply jumper the old ferrite/inductor/whatever, overvoltage protection will be limited... It seems that, in my case, what happened is that the TVS shorted the additional voltage to ground, causing a high current through the smaller component, which burned it out and saved the drive. TVS alone will protect against ESD, but not, I think, overvoltage. I may look for an 0603 fusible component, as you suggest, to replace the smaller part.
07-09-2012 08:00 PM
I also have this same hard drive which just failed two weeks ago. I read through this forum but I'm not sure if the solutions that you mentioned (replacing the EEPROM chip, cutting the 5v or 12v diode) fit my problem. They sound more like the drive doesn't spin up at all.
Like 4nick8 mentioned, my drive seems to power up okay and I can hear it spinning. But then I hear a pattern of clicks like it it trying to catch onto something. This pattern repeats for about 20-30 seconds and then it stops and I can hear the platters spin down. What do you think would be the best thing to try first? Is it worth trying to replace the logic board?
Thanks for any help.
07-10-2012 12:27 PM