TDSYSTEMS K55DLT6F override LED Driver protection

Hello everyone!

I have this TDSYSTEMS TV with MAIN CV9203H-A50, which sometimes turns on without any problems, and other times (most of the time), the LEDs flash for a second and then turn off, but the TV continues to work and the image is blank.

I need to override the LED protection for testing. Can anyone tell me how? I haven't found what the LED driver is. There are no components on the back of the main unit.

I found a post on another forum where someone was able to override it by replacing the PR115 resistor with a 2.7 ohm resistor and removing the SMD resistor marked in the photo. In my case, I tried it and it didn't work.

Any suggestions?

Hello!

Please, post clear picture of marked area of the board with visible markings on the components.

Is this correct?
The 8-pin chip is AS358M



Edit: I leave here another photo where the marks of the resistors can be seen better.

Is there anything that can be done? Any help overriding the LED protection?

On this board, the backlight feedback circuit appears to be implemented with an operational amplifier rather than a dedicated chip, as usual.
Therefore, it's very difficult to do this without schematic of the board.

I think the best way is to disassemble the screen and repair/replace the backlight LED strips.
After repair, I also recommend increasing the resistance of the resistor PR115 by 10-15% to reduce the current through LEDs and thus extend their lifespan.

After disassembling, extracting and checking the LED strips, they were all working fine, although the light tone was blue, which indicates the wear of the LEDs.

After replacing all the LED strips with new ones, the television continued with the same problem.

Following the instructions from the previous message, I replaced the PR115 resistance of 0.68Ω with one of 0.82Ω, and since then, the TV has been working perfectly.

Thank you once more