LG main board help

[sabotage1]

LG 42ln575v standby light blinks 3 times and TV will not turn on. Main board part no. Is eax64797004 1.1 but can only find eax64797004 1.2. Would the 1.2 board work OK in its place?

 

[Reynod]

Are you sure it is the main board?

https/www.youtube.com/watch?v=PTe9Wvf8uI4

Check the output voltages on the power supply board first.