[Galaxy Tab S Q&A, Help & Troubleshooting] hungryhippo123:
What I have is a SM-T800 Wifi Samsung Galaxy Tab S 10.5. Below what odin mode states:

Product Name: SM-T800

Current Binary: Samsung Official

System status: Official

Secure Download: Enabled

KNOX WARRANTY VOID: 0 (0x0000)

RP SWREV: A1

On to the problem: Device stuck at "Samsung Galaxy Tab S" (bootloop). It also will not boot into recovery. It will, however, boot into download mode. Therefore, I booted it into download mode, hooked it up to Odin 3.09, downloaded the latest stock firmware from sammobile, and attempted to flash via Odin. Latest Samsung drivers (1.5.55.0) are installed, and Odin definitely recognizes the device. However Odin always stuck at initialization. I have research and it sounded like the "Half SDS" symptoms in that thread (You cannot boot into android or recovery. It fails at the boot screen, but the screen does turn on none-the-less. The only; thing you can do is top boot into Download mode.).

I have been researching this problem for a while now (2 days and one very late night) and I have read all sorts of threads ( http://xdaforums.com/galaxy-tab-s/help/to-event-soft-brick-disaster-t2838473/post54618555#post54618555 , http://xdaforums.com/galaxy-tab-s/help/how-to-unbrick-tablet-model-t800-t2863246 , http://xdaforums.com/galaxy-tab-s/help/mannage-to-soft-brick-t3025447 , http://theunlockr.com/2014/08/09/how-to-unroot-the-samsung-galaxy-tab-s-10-5-wifi/ , http://xdaforums.com/galaxy-tab-s/help/wiped-accident-t2832346 , http://xdaforums.com/galaxy-tab-s/help/stuck-sudden-bootloop-t3067280/) from forums in every corner of the Internet, but I'm still completely stuck. Any help is greatly appreciated.

What I have done so far and the results:

1.	Kies 3 = Input Model & SN then selected firmware update and initialisation. Download then when come to software update and initialization, the progress stuck at 0% for forever.

2.	Smart switch = same result as Kies 3.

3.	ADB_fastboot = It would not list samsung device.

4.	TWRP (twrp-2.8.7.0-chagallwifi.img.tar) = odin stuck initialization

5.	Odin 1.85, 3.04, 3.07, 3.09, 3.10.6 (T800XXU1BOJ1_T800XAR1BOJ1_HOME.tar) -> stuck initialization. I also downloaded PIT from ( http://xdaforums.com/galaxy-tab-s/help/t800-pit-file-t2818817) and try repartition but still got same result. Also Kies is not running the background during my Odin attempts.

For the record, I don't know any details about the exact version of Android the tablet ran before it failed (I bought this tablet online used). I also used OEM cable then swapped with 4 other cables and switch between window 8.1 and 7 pc. Switched USB ports (Used USB 3.0 and 2.0 ports).

Does stock SM-T800 Tablet has locked bootloader? Do I have to try bootchain? I'm at the end of my wits. Short of an actual eMMC failure, I can't see any reason why this tablet would be permanently hard bricked or why ODIN refuses to cooperate. Can anyone suggest anything?

Finally I have submitted a repair ticket with Samsung but my device is 1yr 4 months old so no warranty. However I check the warranty for my tablet (via http://imeidata.net/warranty/samsung) and it say its has Factory Warranty Coverage until October 31, 2016. What does that mean and would that cover anything with regard to my problem?

P.S. Sorry for long post.:(