Seagate: Fried PCB

[sidgallup]

Ok, long story short, i used a molex to SATA converter because my PSU only had 2 SATA power connectors, after installing the HD turned the PC on and 1 second later i saw a smoke cloud coming from the HD, unscrewed the PCB and a big black burn stain was just below the SATA connectors, i cleaned the thing and one of those little resistanse/transistor/diode whatever is fried... needless to say it is not working anymore so, any ideas of how to fix this? besides finding a PCB replacement..

http://img834.imageshack.us/i/13jun017.jpg/
http://img833.imageshack.us/i/13jun016.jpg/
http://img837.imageshack.us/i/13jun015.jpg/
http://img829.imageshack.us/i/13jun014.jpg/

[HWHacker]

Unless you are good with a test meter and know what those resistance/transistor/diode whatever things are you should get some professional help, um... yes the hard drive PCB need professional help. To many things can be wrong.

From your photos it would look like the power input inductors got fried. Now this does not usually happen on its own. Some other component probably fried and drew sufficient current to burn the inductor. If you jumper across the inductor and power it up for 2 and ONLY 2 seconds you could probably feel the heat on the dead component. Just maybe. OK, then what. So start looking for a donor PCB and a shop to swap ROM.

Lots of Luck.

[fzabkar]

AFAICT, in addition to the burnt inductor (?), there is also a shorted 5V TVS diode below the 8-pin EEPROM chip in the top LH corner of the following photo.

http://img837.imageshack.us/img837/1339/13jun015.jpg

Remove the diode with flush cutters, or desolder it. Post the markings if you require confirmation.

In the event that you need to replace the PCB, you will most probably need to transplant the serial EEPROM chip from patient to donor. Your local TV/AV repair shop should be able to handle this for you. Otherwise the following vendor offers a ROM transfer service for $10, if you purchase the board from them:

http://www.onepcbsolution.com/

These notes should help you identify the components:
http://www.users.on.net/~fzabkar/HDD/HDD_ICs.txt
http://www.users.on.net/~fzabkar/HDD/TVS_diodes.txt