trying to repair tv

[rickydavid1234]

i am trying to repair an lcd smart tv. i have replaced the power, main and t con boards but stll have the same problem that i started with. no picture or sound and i have a clicking sound coming from the main board. any sugestions please?

 

[rickydavid1234]

MERGED QUESTION
Question from rickydavid1234 : "clicking noise coming from main circuit board in panasonic TX-42AS650B smart tv"

Iam trying to repair a panasonic TX-42AS650B, I have replaced the power board, main board and the t con board in a LCD smart tv and i still have the same problem as what i started with which is no sound, no picture and a clicking noise coming from the main board. the tv comes on and stays on and the back light is working and i am not shure what to try next. i am new to tv repairs and need some advice on my next move with the project.