LG47LD650 / flickering screen (only for the first few minutes after initial power-on)

[soelli]

Hello everyone,

My
LG 47LD650-ZC.BEUWLJG
shows a flickering screen the first few minutes after powering on the TV.
After that, the TV works as expected.

The flickering appears on the TV-menu and the HDMI source (... an I guess also on all other sources)
I hope the animated gif I uploaded will show my problem.

I was hoping that it will be a capacitor problem, but the big ones on the powery supply board seems to be ok.

What could be the problem?
Thank you.

Regards,
Alex