G928F Stuck on Samsung splash screen after Odin root

[AC Question]

Hi guys.

Had my S6+ for a good few months now on Lollipop, rooted from day one. Was playing up and went into a boot cycle by itself lasting between 3-5 mins before booting again so I decided to flash stock Marshmallow which went fine, using Smart Switch.

It obviously removed root so I went to add it again.

Kernel is the same I used before successfully, 928-FKLSI-ODIN.tar

Same guide I used before as well. the android soul DOT com how-to-root-samsung-galaxy-s6-edge-plus-83360

Odin output from 'Pass' flash-
<ID:0/004> Added!!
<ID:0/004> Odin engine v(ID:3.1100)..
<ID:0/004> File analysis..
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
<ID:0/004> SingleDownload.
<ID:0/004> boot.img
<ID:0/004> NAND Write Start!!
<ID:0/004> RQT_CLOSE !!
<ID:0/004> RES OK !!
<ID:0/004> Removed!!
<ID:0/004> Remain Port .... 0
<OSM> All threads completed. (succeed 1 / failed 0

Phone reboots when told to by Odin, but sits on the Samsung Powered by Android screen forever. I can get to download though not recovery mode.

Any options other than wait 2 hours to download stock firmware? Smart Switch doesn't recognise the phone anymore so I can't go that way.

TIA for all your help.