lg 60uj6300 dim backlights

[lotas]

Regular backlight, one strip consists of two parts (6 led + 5 led).

[Diah]

Regular backlight, one strip consists of two parts (6 led + 5 led).

i am interesting on the diode he mentioned... before each led have on inside... now from his talking just one for all protection.

[Diah]

if yours measurements and talking 100% correct at yours POST #19 then the issue in 2 way can say
1- some one inter E.Z adjust service menu and changed LED BL Type.. LG have digital control of LED BL
2- flip yours PSU and inspect the BL circuit you have several SMD low sync R . you could find one changed Value to high or open.

[shadetreetrader11]

Tiny surface mount diode. Looks like a protection diode to me.

[Diah]

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you should test this tiny Diode when the socket disconnected.. .... if you did and its was fine... check the points i listed before

[shadetreetrader11]

The diodes on the led strips measured fine. I have tested all the resistors on the back of the power supply. I also esr all the caps. Everything seems normal on power supply board. As I already posted on my 1st post I have checked all the backlight settings and that eco crap is all shut off.

[shadetreetrader11]

Is it safe to say I can put the screen back together at this point and then work with either power supply or mother board or the ez settings you were talking about.

[Diah]

i would leave the screen out until you have full function BL..
try send IN_STOP in blind way with service RC followed with 0413 . TV go to standby .. leave it 1 minute... plug it out from wall , leave it again 1 minute out. then turn on... this is shipping reset mode.
i still believe you have LED BL issue. yours equipment could tricking you with Values. i would use only normal DM not scope one.

[Davi.p]

Another thread that ends to bitches.. we wait "Currents Freq", "pwm at V" and other amenities...

Anyway 9v of ripple sounds abnormal.. have you checked the 4 diodes i said?

[shadetreetrader11]

Davi.p
yes I unsoldered one leg of each diode and tested them. Also checked the caps with esr meter as well.

[shadetreetrader11]

Well I put it back together and it's working. (Not sure how long) ha ha. Hopefully it was just a solder joint but I highly doubt that. I guess I'm curious if leds can have intermittent faults, or generally speaking are they normally good or bad?

[Davi.p]

i would not hope, it will fail again.. i would do a YouTube RBGWB video test to see if there are dark blotches.. i would do an ultimate effort to do some other resolder in the led power booster section of psb so you can stay more quiet..