Can u help me to recover data from a pen drive which is not detected in windows. I opened the drive and found all components (except for main chip) are OK. Can u advice me any device or software for recovery.

do you mean the usb flash disk , thats a hard process

Hy
Yuo can try with this tool :
h**p://www.cgsecurity.org/wiki/TestDisk_Download

i had succesfully recovered inacessible 2 GB SD card.

Buona Fortuna

download the URGENTRECOVERY Demo. http://www.urgentrecovery.com

good luck

I don't think these programs will help if the drive isn't recognized.

What someone needs to do is come out with a PC3000-like program for pen drives. Something that has a database of all the common controller chips, and how they arrange data. Then, you could just remove the flash chips, put in a reader, and have the special software decode it, take into account bad blocks, wear leveling, etc...

Hi Rakesh,
I Am From Chandigarh ,India .Where Are You From .Are You A Recovery Technician or a End User .If You Are a End User Please Do Not Spoil The Drive Beyond Anyones Repair Options .I The Data Imp or Just The Pen Drive Repairs

_________________
Regards
Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com

If main NAND/flash memory semiconductor is shot, your only chance is with an electron microscope, examining charges. However, you may want to look at a EPROM/Flash memory programmer if desperate (however write levelling will be a pain to get around).

scegs

If your pendrive is not recognized by windows, almost for sure you have blown up the microfusible on the +5v side.
Check it (seem like a smd resistor but darker, near to the "input pins " of usb drive).

You may bypass it with a thin- 0.2mm- piece off copper.

If not, check the quartz osc -it have to be 12MHz-

In my experience, resoldering the circuit board where the four USB contacts connect to it stands a 70 percent chance of repairing it so the device is recognized. Over time, repeated insertion and removal stresses and eventually microfractures these solder joints, causing a bad electrical connection. Try resoldering those four solder joints. Spooging the joints with soldering rosin first makes it a lot easier and will likely prevent any solder bridge from accidentally forming to short the contacts.

_________________
http://www.youtube.com/user/TerraformingMaster

"Spooging"?

Great word!!!

_________________
PC Image Data Recovery
http://www.pcimage.co.uk

New!! HDD-PCB.COM for all your PCB and donor HDD requirements!