Problem with my TV's power supply

Hello!

I’m facing an issue with my old trusty Bravia TV (model: KDL-47R505A)

The problem is that the TV turns on and off a couple of times and then turns off completely, giving me 6 blinks on the standby red light, I know that the 6 blinks mean a backlight issue, so I proceeded to disassemble the TV and test the power supply with a multimeter.

I've tested all voltage outputs and they are all good, but the BL_ON (backlight ON) output power line is giving me an unstable reading, oscillating between 0 and 3.3v, not giving me a steady 3.3v, therefore the TV backlight blinks a couple of times and then the TV completely turns off as a mechanism of protection I think.

Any advice on which components should I test? any capacitors, resistors or something?

I can’t find any schematics of this power supply (Sony G4 1-888-308-11), so I’m a little blindfolded on this, I don’t wanna throw away this TV.

This is the power supply:

And this is the output that has the problem:

Any help will be appreciated, many thanks in advance!