All, I'm looking for some advice and knowledge.

I have a Western Digital 640GB drive (WD6400AAKS-65A7B2) that was my primary drive. It suffered a power surge when another drive daisy chained to it fried. Right now it is dead (no spinning with power applied, no smoke, no communications and no visibly fried parts). I've pulled off the 12V and 5V TVSs but no joy.

I know that the BIOS for the drive is located in the main controller IC, but I'm confused as to the best course to get the drive running and data recovered.

From what I read, I NEED to swap the main IC to a new exact PCB to bring the drive back. I'm assuming that's IF the main IC isn't the issue. Most posters seem to assume that the main IC is going to be good, but what if it's not? Is there any hope for the data then?

Thanks for the help

Tony

First: you have to replace the entire PCB with matched donor and regenerate the adaptive from SA. (PC3K, SD tools, DFL...etc)
then decide if the drive has another issue or not.

Good luck

Your drive belongs to Atlantis Family. As far as I remember, they all have an external flash chip (U12), so all you need is a good PCB 701590 of same revision as yours and a technician to swap the flash chips.