Hello,
I have a Seagate 80 GB HDD, ST380013A. My son connected the power connector while the power was on and shorted it out while changing all the hardware to a new shell. There was a spark he says and the harddrive is now not reconized in C-Mos. The pcb is now missing one of the diodes (at least that is what it looks like to me). I purchased another harddrive with the same model number and firmware number which is 8.01 and switched the pcb's. The drive is still not reconized in C-Mos but you can feel the disc turning and you can hear it clicking and then after about 30 seconds or so it quiets down. Should I try and have the old pcb fixed with parts from the good one or is it time to quit and take it to a pro to have them take over?
Thanks in advance for any help,
LeRoy
Santa Ana, Calif.

Must be take it to a pro or you must buy PC3K

no need for pc3k here . why dont u change ROM chip from old pcb to new pcb . U can hear clicking sounds because the pcb did not match .

I think you are right. Isn't the harddrive searching for information it isn't finding on the disc and thats why I can hear it clicking? Does the original Rom have information that it is looking for on the disc? If the original ROM needs to be installed on the new pcb, doesn't that need to be done by an expert? Are there people or companies out there that do that? How do you search for them? Which chip is the rom?
Thanks for your help,
LeRoy

This clicks then stop " Head Mask"

sometimes when u change the PCB without get microcode, the Hard Disk start spin cannot get sectors, but u can get DRDY DSC but doenst make knock sounds.

Could be a preamplifier damaged too

What are signs of the preamp being damaged?

Isn't the harddrive searching for information it isn't finding on the disc and thats why I can hear it clicking? Does the original Rom have information that it is looking for on the disc? If the original ROM needs to be installed on the new pcb, doesn't that need to be done by an expert? Are there people or companies out there that do that? How do you search for them? Which chip is the rom? What signs point to the preamp being damaged? Is there a way to remove the information from the original rom and rewrite it into the rom on the new pcb? Avoiding the removing and reinstalling of the old rom on to the new pcb? You can get ahold of me direct at: landnroberts@hotmail.com
Thanks for your help,
LeRoy

The rom chip holds the basic boot code for the drive.If they don't match it won't be able to read the drive. It needs to match the firmware on the disk for it to initialize properly.If you are comfortable with soldering surface mount chips it is the Atmel ( or ST) IC on the PCB that only has legs on 2 sides . It needs to be moved from the original drives PCB to the new one to work.This is for WD but same idea
http://forum.hddguru.com/looking-for-a-hard-drive-board-for-a-wd-vt6961.html?highlight=rom+swap

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I think ST is a sub company of Lucas

Been PMing back & forth he has identical PCB with same firmware drive knocks for 30 secs then stops. Anyone have head / pre-amp connector pinout to help this guy?

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I think ST is a sub company of Lucas