Hi All,

I did rom chip transfering for WD drive (see the pcb in the attached link)
http://img227.imageshack.us/img227/8383/img0066hq.jpg
After the transfering the PCB just died.
This is the second time it happend (the first one was with hitachi drive).
I did the transferring with SMT station (hot air gun) and did it with a great caution.
Any reason why it happend and how can I avoid from this to be in the future?

Best Regards,

Proper diagnose and avoid frequenting bad companies...

The picture or the flash is wonky. Maybe worth heating each leg with a solder iron and make sure the leg is touching the pad.

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All went well until I plugged the drive in.

Are you certain that the chip was OK to start with? What was the failure symptom of the original board?

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A backup a day keeps DR away.

The first symptom was corrupted recognized name of the hard drive (firmware issue).
I tried rom chip tranfer to a good PCB in order to diminish the causes but it looks like that I fried somehow the drive or shorted it.
I only heated the chip and not the rest chips..
What can couse the pcb to died?
Any precaution that I can take next time?

BlackST I did not get your answer bad companies? what do you mean?

make 100% certain the ROM is connected well.

I have seen where ROM is not fully connected (it may look like it is) and then with some re-soldering it works.


I highly recommend using an actual iron to solder TO the board, for removal rework station will work fine as long as your careful, as you mentioned.


Regards,

You may like to try this technique. It seems a lot less brutal to me.

CHIP QUIK SMD Removal Method using a standard solder iron:
http://www.chipquikinc.com/instructions.html

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A backup a day keeps DR away.

Blah blah blah... There's nothing to invent. Only a SMD hot air station and controlled temp soldering station and some practice. Otherwise, don't do that job.