Hi there and welcome
Can you tell me please exactly what happens when you power off the phone by removing the battery, then hold the volume up and power?
Please tell me what happens then
Thanks, ***** ***** try to flash the device via your computer to see if we can get it working
Can you do the following please
Download the firmware you want to install at http://SamMobile.com/firmwares
Once the download is complete, extract the firmware file to a place you will remember, like a folder on your desktop.
Download Odin. Odin is a simple utility that is used to flash firmware to Samsung devices. Here is a link to one source: http://bitli.es/HEZIgA
Make sure your phone is off and disconnected from your computer.
Open Odin. Under Options, only "Auto Reboot" and "F. Reset Time" should be checked.
Click the "AP" (or "PDA") box and browse for the extracted firmware file.
Press and hold the following buttons in order: Volume Down + Home + Power. Keep holding them until you see a screen that says "Warning!!" at the top.
Press the Volume Up button to continue.
The next screen will show the Android logo and say "ODIN MODE" at the top left. The text is very tiny - almost unreadable. So if you can't read it, you are on the right track.
Now connect your phone to your computer via USB.
In Odin, look to the top left and wait until you see in the leftmost box "COM" followed by a colon and a number, such as "COM:4". The number doesn't matter. Once you see that, you can proceed.
In the Message box in Odin, you should see several lines of text.
Press Start in Odin.
Odin will begin processing, and on your screen you will see "Downloading" with a status bar underneath.
When Odin is successfully finished, you will see in the Message box "All threads completed".
Your phone should begin rebooting. You can disconnect from the computer.
Let me know the results please
ok, then try it this way please
Pull batteryPut battery back inHold volume up+downPlug USB cord with Odin running on pc
It is the internal memory that has faulted.
A corrupted firmware can cause this. But we have ruled this out by trying to reinstall it. The fact the problem continues and the PC wont detect it correctly, confirms this
I am really sorry about this and you are going to have to return the phone to have it replaced. It will be covered by the warranty if this has not expired, and the replacement will be done at no cost to you.
If you have problems, or would like any additional information or assistance, please do not hesitate to let me know.