where's the BIOS chip on a WD6400AAKS-22A7B2 PCB?

[wojciech06]

My hard drive won't boot up and I think the problem is the damaged circuit board. I've already bought a new one from the same model but it doesn't work. The hard drive will spin now but it's not recognized by my pc. I think I may have to swap the BIOS chip from the old PCB. Where is the BIOS chip located on the PCB? http:// http://

 

[lonewolf7]

Just wait for "fzabkar" to look at your thread. He is the one who can give you a better answer.

 

[fzabkar]

The usual location for the serial flash memory (aka "ROM") is U12. Unfortunately U12 is vacant, which means that this information is embedded within the Marvell MCU (8818845D-BHG2).

Does your original PCB spin up the drive?

 

[wojciech06]

The usual location for the serial flash memory (aka "ROM") is U12. Unfortunately U12 is vacant, which means that this information is embedded within the Marvell MCU (8818845D-BHG2).

Does your original PCB spin up the drive?

No, the original doesn't spin up the drive.

 

[fzabkar]

There is a WDR tool that may be able to regenerate the ROM on the donor board from a backup in the System Area on the platters.

See http://malthus.zapto.org/viewtopic.php?t=84&p=1950#p1950

 

[wojciech06]

There is a WDR tool that may be able to regenerate the ROM on the donor board from a backup in the System Area on the platters.

See http://malthus.zapto.org/viewtopic.php?t=84&p=1950#p1950

Thank you. I have ordered a new sata cable to connect the hard drive with the new PCB to my pc which is now running on an ssd. Recently I bought a new ssd for my pc, and started using the old WD hard drive as an external drive and I think it was the external case that damaged the PCB on the hard drive. Soon I'll let you know if the WDR tool worked for me. Thanks again.

 

[fzabkar]

Check the TV diodes on the damaged board.

See http://www.users.on.net/~fzabkar/HDD/TVS_diode_FAQ.html

... and http://www.users.on.net/~fzabkar/HDD/bigcircuitboard_diodes.jpg

 

[wojciech06]

I got a new PCB. The hard drive starts spinning now and I can hear the head searching for data for a short while and then it stops searching but the drive keeps spinning. I was hoping to fix the problem with the WDR tools but WDR 3.0 does not detect the hard drive with a new PCB. Do I need a different version of WDR tools?

 

[fzabkar]

You may get better help at The HDD Oracle:

http://malthus.zapto.org

 

[wojciech06]

You may get better help at The HDD Oracle:

http://malthus.zapto.org

Would you have any idea where I could the relevant software from?

 

[fzabkar]

You can get the software via The HDD Oracle. In fact "Spildit" (from the Oracle) is currently helping someone with a similar problem at HDD Guru.