Hi everybody and a happy new year. I am looking for help. I have a Barracuda IV 80GB, HDD, but it has a scratched PCB, so i decided to swap from another Barracuda IV, but now the HDD spins up and is not detected in bios.... can help me somebody to fix this problem??

sorry the HDD IS ST380021A and the spare PCB was from ST340016A.

This problem is ROM version compatibility problem.

but how can i fix it?

Let's try!
For this will be necessary to rewrite ROM.

The First question:
What Firmware version on face sticker these two disks?

firmware was 3.05 for 80gig, but after the pcb scratch i changed to 3.19, and the 40g was 3.19 too....,
???but how to rewrite the rom?

....sorry for my bad english i mean i changed the firmware before the scratch occured, not after

I's too not englishman!
You speak in russian?

I try to understand:
Before update, disk 80Gb is have F/W 3.05?
Then was update on F/W 3.19 and disk continued work good.
And in a certain time he conked?

Disk 40Gb was always f/w 3.19?
I'm good understand?

yes, thaths right, sorry i speak only slovak, german and pooorly english, but i want to learn russian, do you have ICQ?

At the moment I have no ICQ.
But will in the future appear!

Suppose that with disk 80Gb there is else problems, except PCB.
If versions f/w in ROM coincide, that usually PCB possible to change without problems, beside these models.

now,i connected it via serial and it say invalid cert code and writes that, fw is 3.05 but requires 3.19 ???? can i fix it????

The Main problem is concluded not in version Cert!
If you have an experience, it is necessary to try to remove IC ROM with PCB 80Gb and install this IC on PCB 40 Gb.
For this you will be a necessary soldering station.
If no experience and equipment that better not to do!

that´s not a problem for my,i will do it, but, is there any other way, e.g. flashing via the serial cable?

I use p3k for writing ROM by means of serial cable.
But beside you is damaged PCB and this method can be not well!

i ve thinked only about flashing it, cause the spare pcb is fully funtionable, but as i understand it can be done, but i will need pc3k plus the correct firmware right?

will better if write in fault-free PCB, contents of the FLASH-IC with faulty PCB.
The Problem can be when reading with faulty PCB.
So I have offered method of the soldering.

Hi,

Swapping the rom chips is the fastest if U don't have a donor with that FW version.
But what is the problem with the patient (80G) pcb?
if it is shorted, U may try to simply remove/change the TVS on the panel and hope nothing else is burnt.

regards,
pepe

to pepe: the 80GB pcb was scratched on the bottom side, so it is not usuabe, now i´ve changed the memory, but nothing happened, it writes the same via serial terminal that the cert code is invalid and the stuff was not readable and when i tried to look the serial of the drive it beginns with zeros.... i think this is some kind of probem with authorisation isnt it?