We just wanted to follow up with some additional steps you can try. Before completing any more steps, please check of the device has any sd cards in the sd slot. If it does please remove it before proceeding. After removing the sd card please re-attempt to boot the device. If does not work the next steps involving wiping the device. However this will result in unrecoverable LOSS OF DATA.
If you have not already done so please download and install Kies to your computer. After installing connect your device to your computer via your USB cable. Wait to see if Kies recognizes your device. If it does then proceed to the next step.
1 Open Kies 3 and click Tools > Firmware Upgrade and Initialization.
2 Enter your device Model name and click OK.
3 Enter the device IMEI number and click OK.
4 Kies 3 will verify that the feature is available for your device. If the feature is available, click OK to continue.
5 The firmware version is displayed along with a note that the information on your device will be permanently deleted during this process. Click OK to continue.
6 Follow the steps to prepare your device for emergency recovery. Mark the checkbox next to I have read all of the above information. Select whether you agree to share this update with Samsung. Connect your device to Kies when you have activated the download mode. When your device is in download mode and connected to Kies 3, the Start upgrade button is available. Click Start upgrade to reinstall the firmware.
7 Touch Create backup to create a copy of selected items before proceeding. Touch Skip backup to proceed without backing up any items.
8 Kies 3 will download and prepare your system to update the firmware. This process can take some time. The time will vary based on your network and computer capabilities.
9 Respond to any security warnings about installing software.
10 The progress screen is shown during the upgrade process. The process will take several minutes to complete. Do not disconnect your device, turn the device off, or turn off your computer during this process.
11 Click OK when the upgrade is finished.
Thanks. ^Jake