LG switches off immediatley

[downunder.ag]

My LG 55LN5710 built august 2013
when i switch on with remote or tv button it comes with LG logo for 2 seconds then goes off
could this be a power supply

 

[downunder.ag]

MERGED QUESTION
Question from downunder.ag : "LG 55LN5710 built august 2013"

My LG 55LN5710 built august 2013
when i switch on with remote or tv button it comes with LG logo for 2 seconds then goes off
could this be a power supply