4-16
Samsung Electronics
Troubleshooting
4-1-8 Poor PC Connection
Symptom
USB cable is connected to the PC, but no connection is established
Does the unit show in
“My Computer” as a
removable storage?
Is there USB
connection icon displayed
on the LCD?
Completion
Recheck after installing
the driver.
Yes
No
Yes
Yes
Is there an
“Unknown Device” show
in Device Manager?
Can NAND FORMAT
and BOOT Update be
performed with DFU?
No
No
Yes
No
Can formatting be
done in Explorer?
Is the USB
connection established
after a RESET?
No
Defective
Yes
Yes
Yes
No
No
Is it accessible?
USB connection