Some time ago I connected a power adapter to my WD2500BB that had the opposite polarity at the terminals, as a result the drive stopped making any kind of sound, basically just like it happened here http://community.wdc.com/t5/External-Drives-for-PC/Plugged-wrong-power-adapter-into-my-250-gb-HD/td-p/99574 I was about to remove the D6 diode, but to my surprise there is no such diode in the board in fact there is no D5 or resistors R81 or R82 either (is this normal? A drive without the protection circuitry).
This is why my guesses are the board really got fried. So I want to know what can I do now, I’ve noticed some burnt parts, here are some pictures of the board.
Thanks in advance.