1: *#*#1478963#*#*
2: *#*#0066#*#*
3: *#*#11111#*#*
4: *#7501#
5 : *#91#
Good Luck…
thanks got my logo screen back 
Hi. I have the same problem after factory reset on china phone. You have many codes? which do i need or do i use all of these? Do i input the codes from my phone keypad? Sorry for any inconvenience but any assistance would be greatly appreciated.
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Fantastic this worked straight away and fixed both start up and close down at the same time. Many thanks.
i have a note 3 clone and none of these codes worked for me. where can i find these codes? does anyone have any for my phone?