LG C1 65'' dead standby

[jacobtc]

I've owned this C1 from new since late 2021, and it has now suddenly started with the following symptom:
If power has been connected for a while, the red standby lamp turns off, and the tv wont turn on (no reaction from remote or button on tv).
If power has been disconnected for 5 minutes, the tv turns on fine, until turned off and left for a couple minutes, as the standby light will then turn off again.

I've seached and found that this is most likely a failing PSU, and I've seen repair services on eBay fixing these symptoms, so I am hoping that someone here has fixed this before.

I haven't found a diagram for this yet.
PSU: EAY65689423

[Davi.p]

check the power board if it has a microcontroller, it is maybe damaged or planned obsol. inside..

[Diah]

check and replace C601 & C602 on PSU 820nF 500V

[nomoresonys]

Can you post some clear pictures of these boards.