5v standby flickering

[Trofazni]

Hello, this is my first thread. I have a bad power supply on grunding lcd tv 32LXW 82-8729, psu is Beko LCD PSU-3. I found schematics, i will attach it. I recorded video of a problem on youtube and you have visual of problem. Everything i checked so far is ok.
On video, first measurement is on hot side, power supply for IC 1002, it is not steady, as you can see. Second measurement is on secondary side, 5vstb rail. TR1002 is buzzing, trying to start, but it has problem holding 5v.. Caps are ok, esr measured, some replaced, still problem persists.
Can you give me directions of what might be a problem?

From 1:16 on video, you can see it flickering.. Mobile camera is unable to capture it clearly, but its flickering all the time...
https://www.youtube.com/watch?v=gGNGFuqYdpM

[cpt.charlie]

Re: 5v standby flickering

Check the cap that filters the power for the PWM chip.

[Trofazni]

Re: 5v standby flickering

All caps have beeen checked with esr meter...

[cpt.charlie]

Re: 5v standby flickering

Do you have the proper readings at IC1002 as shown in the schematic?

[budm]

Re: 5v standby flickering

I know you check the ESR of the caps but the capacitance of C1015, C1058 are OK?
Same thing for the output filter caps.
D1007 good?

[jazzie366]

Re: 5v standby flickering

Hello, this is my first thread. I have a bad power supply on grunding lcd tv 32LXW 82-8729, psu is Beko LCD PSU-3. I found schematics, i will attach it. I recorded video of a problem on youtube and you have visual of problem. Everything i checked so far is ok.
On video, first measurement is on hot side, power supply for IC 1002, it is not steady, as you can see. Second measurement is on secondary side, 5vstb rail. TR1002 is buzzing, trying to start, but it has problem holding 5v.. Caps are ok, esr measured, some replaced, still problem persists.
Can you give me directions of what might be a problem?

From 1:16 on video, you can see it flickering.. Mobile camera is unable to capture it clearly, but its flickering all the time...
https://www.youtube.com/watch?v=gGNGFuqYdpM

I see shit caps on that board that should be replaced whether or not they're bad. I'd do that and then check everything. If it's still making a buzzing noise, then more troubleshooting is necessary.