www.deadharddrive.com
Deadharddrive forum
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Question: WD Recovery - U12 Chip Swap

 
Post new topic   Reply to topic    www.deadharddrive.com Forum Index -> General chat
View previous topic :: View next topic  
Author Message
atlcr
Officially active!


Joined: 13 Jul 2011
Posts: 3

PostPosted: Fri Jul 06, 2012 5:27 am    Post subject: Question: WD Recovery - U12 Chip Swap Reply with quote

I'm trying to recover a drive from WD (1600BB) for a friend.

When I initially plugged it in, there was no spin up or sound of any kind. I finally found, on ebay, a replacement PCB to put on the bad drive. After doing so, I plugged it in and it powered up and I could hear the platters spinning, but it was not recognized by the system. Not a big surprise there as I was told by the seller that I need to swap out the U12 chip.

I do a lot of computer repair, but not much with the soldering iron. So, I was a little hesitant to try this, but I decided to anyway. I have a nice Weller soldering station so I might as well use it. Smile

Though it was difficult, I was finally able to remove both U12 chips, though they both still had solder globs on a few legs. I lined up the old chip on the new board as carefully as I could and then applied the soldering iron to each pin until the solder on the board melted and joined with the pins.

Now, when I plug it in, I get the same symptoms I got originally: no spin, no sound, etc.

So my question is: Does this mean that the U12 chip from the bad drive was bad?

I'm also wondering if I may have accidently brought the soldering iron too close to other components and caused damage to other PCB components.

Other possibilities might include bad solder joints or chip reversal. I checked the solder joints with a loupe and everything is making contact and the solder is shiny.

So, could putting the chip on backwards cause this problem? If so can I just take it off and attach it the other way to test? Is it possible to permanently damage the drive by doing this? Or if it is backwards now, did supplying it with power kill it?

Lots of questions I know, but I could really use some help with this as it is new territory for me and I need to tell my friend something one way or the other as I've had this drive for months now (took a long time to find a compatible PCB).

Thanks in Advance!
_________________
Computer Repair Atlanta
Back to top
View user's profile Send private message
harddrivespecialist
Deadharddrive regular +4


Joined: 29 Dec 2007
Posts: 471
Location: Providence, RI. Boston, MA USA

PostPosted: Fri Jul 06, 2012 3:30 pm    Post subject: Reply with quote

Upload a picture of your PCB here, good quality please. I will take a look at it and will tell you if chip is soldered correctly.
_________________
www.datarecoveryne.com
Back to top
View user's profile Send private message Visit poster's website
atlcr
Officially active!


Joined: 13 Jul 2011
Posts: 3

PostPosted: Sat Jul 14, 2012 10:51 pm    Post subject: Reply with quote

Well, you'll get a kick out of this picture.

I took the PCB off to take the photos, and it was a disaster. Apparently, something went wrong, overheated, and then melted the foam backing onto the U12 chip. Not pretty.

I know the chip wasn't perfectly lined up, but it was making contact with all pins. I might have reversed the orientation though, placing the chip backwards. Could that have caused this?

A good learning experience I suppose...

<sigh>


_________________
Computer Repair Atlanta
Back to top
View user's profile Send private message
atlcr
Officially active!


Joined: 13 Jul 2011
Posts: 3

PostPosted: Sat Jul 14, 2012 11:04 pm    Post subject: Reply with quote

Dangit...I just noticed that I didn't clean the solder off the tracers on the PCB well enough. I suppose that could definitely cause this problem.
_________________
Computer Repair Atlanta
Back to top
View user's profile Send private message
harddrivespecialist
Deadharddrive regular +4


Joined: 29 Dec 2007
Posts: 471
Location: Providence, RI. Boston, MA USA

PostPosted: Tue Jul 17, 2012 7:38 pm    Post subject: Reply with quote

You definitely need a new PCB and to rebuild/Match ROM info on that drive.
_________________
www.datarecoveryne.com
Back to top
View user's profile Send private message Visit poster's website
Albert
Posted once


Joined: 18 Jun 2012
Posts: 1

PostPosted: Tue Jul 31, 2012 6:19 pm    Post subject: Reply with quote

Newton IT’s Smart single-click desktop video conferencing and data sharing experience that gives users the ability to communicate with colleagues, clients and partners in the office, from the road or in the home office.

video Conferencing UK
Back to top
View user's profile Send private message
hedgenursery
Active contributor


Joined: 18 Jul 2012
Posts: 6

PostPosted: Thu Aug 09, 2012 6:34 am    Post subject: Reply with quote

You need a new PCB and to rebuild/Match ROM details on that produce.
_________________
hedging plants
Back to top
View user's profile Send private message
Eric Lee
Deadharddrive regular +4


Joined: 26 Apr 2009
Posts: 308
Location: China

PostPosted: Wed Sep 12, 2012 1:32 pm    Post subject: Reply with quote

Hi,

If you don't mind, Sorry that I have to say it is my first time to see such a terrible soldering chips. The chips is dead.

Thanks, Eric.
_________________
HK MingDi electronics Co., Ltd. http://www.hkmingdi.com/enindex.asp
MSN/E-mail:eric_lee8341@hotmail.com
Specialize in HDD PCB!!! Real in stock!!
Skype:eric.lee1984
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
corbingravely
Deadharddrive regular +2


Joined: 14 Nov 2013
Posts: 76
Location: Dubai, UAE

PostPosted: Thu Jul 16, 2015 8:41 am    Post subject: Reply with quote

Even if you swap the chip it is not going to work according to my knowledge. Even if it works there is a great chance that every single data will be lost. So be careful before you do it.






------------------------------------
CORBIN GRAVELY
best schools in Muscat
------------------------------------
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    www.deadharddrive.com Forum Index -> General chat All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


www.deadharddrive.com topic RSS feed 
Powered by phpBB © 2001, 2005 phpBB Group