What is my problem with flashing?

[AC Question]

When I tried to flash a stock ROM to my Samsung Galaxy Tab S2 8.0, the log in Odin3 says this:

<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> T710XXU1BOH7_T710XAR1BOH7_HOME.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/005> Added!!
<ID:0/005> Odin engine v(ID:3.1005)..
<ID:0/005> File analysis..
<ID:0/005> SetupConnection..
<ID:0/005> Initialzation..
<ID:0/005> Get PIT for mapping..
<ID:0/005> Firmware update start..
<ID:0/005> SingleDownload.
<ID:0/005> sboot.bin
<ID:0/005> NAND Write Start!!
<ID:0/005> boot.img
<ID:0/005> FAIL!
<ID:0/005>
<ID:0/005> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)

What does this mean? How can I solve my problem?

 

[Rukbat]

<ID:0/005> NAND Write Start!!
<ID:0/005> boot.img
<ID:0/005> FAIL!

You have bad NAND storage - you'll probably need a new motherboard.