Panasonic TC-L50EM5 after 10 seconds turns off

Hi ... so my Panasonic 50" (Model : TC-L50EM5) stays on for 10 seconds and then turns off. I have to unplug re-plug to be able ton turn it on again .

FYI the power supply board produces like a very faint "clicking sound" after it turns off.
Part number : TNP4G532

Can you help me in getting this board ?