[hany_national]

“USB Device Not Recognized” Symptom


Many times we see flash storage that is not recognized by the Operating
System due to hardware problems. You can troubleshoot it by follow the
steps given below:
Step- 1. Open the Case gently with a putty knife or strong blade.



Step- 2. Peel out circuit board.



Step -3 Physically examination for any damage or broken component and traces with magnifying glass.





Step – 4 Resolder connector first then connect device with pc and check the problem gone away. If not do the next step.




Step – 5 Resolder all components around the connector and controller
chip. Especially check fuse type of resistors. Sometime the value of
resistors increases.





Step -6 Resolder Oscillator crystal (usually 12 MHz). And reconnect device with pc if work it’s ok otherwise replace crystal.






– If same package of crystal oscillator is available then arrange a 12
MHz crystal oscillator from existing USB device like USB memory card
reader, USB drive or etc and make connection as below.

1) Remove crystal
2) Take two wire and crystal Solder the wires to crystal
3) Solder wires and crystal Sold crystal to appropriate place




Adjust crystal in the case and now the device is ready to check

I hope these steps will be helpful to you. However if all efforts
failed to gain your goal, don’t worry there are other methods to recover
your important data.

[holdman]

اخى العزيز موضوعك مميز جدا لكنى ارغب ان تضع الصور مع الكتابع العربيه حتى يستفيد الكل وهذا لا ينقص من حقك شيئا لكن لافادة الجميع ولك منى جزيل الشكر ............
واتمنى ان يضع احد مخططات الفلاشات لافادة الجميع ايضا
وشكرا

[mahi]

اخى العزيز موضوعك مميز جدا لكنى ارغب ان تضع الصور مع الكتابع العربية بارك الله فيك أخي الكريم....