Hi all,
I had posted about this a while ago but ended up getting side tracked. Now, before I dump it I decided to give it one more shot.
No matter what I do I can't get any backlight or picture on the screen.
I have the dreaded 2-5 blink code. I unplug 2 tcon ribbon connectors, or all of them no difference.
I unplugged the ribbon connectors on each bottom left/right that plug into the driver boards and no difference.
I tested the board OUT of the TV just to make sure using this video as a reference: https://www.youtube.com/watch?v=DCXHNN8nrws and the voltages seem to match up. I also tried different main board and power supply board but no luck.
I feel like maybe when the board is connected to the TV/panel theres a short somewhere... I am just not sure how or where to look.
Here are the voltages I was getting the last time I checked the board while it was plugged into the TV under load. (this is my first attempt at fixing a TV so please forgive me for my noobishness):
Pin 1, PNL_12V: 11.91v
Pin 2, PNL_12V: 11.94v
Pin 3, GROUND: 0.28v
Pin 4, GROUND: 0.27v (although ground, just posting my meter reading)
Pin 5, UR13.2v: 13.35v
PIN 6, UR13.2v: 13v
PIN 7, UR13.2v: 13.35v
PIN 8, UR13.2v: 13v
PIN 9, GROUND: 02.4v (again, just posting my auto range meter reading)
PIN 10, GROUND: 02.3v
PIN 11, GROUND: 02.3v
PIN 12, GROUND: 0.23v
PIN 13, AC_DET: 3.3v
PIN 14, PS_ON: 3.3v
PIN 15, BU5v: 5.04v
PIN 16, PNL_POW: 5v
PIN 17, PWM1: 13.3v
PIN 18, NC: 13.4v
PIN 19, DIMMER: 13.4v
PIN 20, ?: 13.6v
PIN 21, OFL: 3.4v
PIN 22, ERROR: This pin I tested a few times goes up and down 3v, 5v, 7v in no order. Basically bounces around.
PIN 23, PWM2 / NC?: 9.5v
PIN 24, STB: 9.5v
Appreciate all of your help.
I had posted about this a while ago but ended up getting side tracked. Now, before I dump it I decided to give it one more shot.
No matter what I do I can't get any backlight or picture on the screen.
I have the dreaded 2-5 blink code. I unplug 2 tcon ribbon connectors, or all of them no difference.
I unplugged the ribbon connectors on each bottom left/right that plug into the driver boards and no difference.
I tested the board OUT of the TV just to make sure using this video as a reference: https://www.youtube.com/watch?v=DCXHNN8nrws and the voltages seem to match up. I also tried different main board and power supply board but no luck.
I feel like maybe when the board is connected to the TV/panel theres a short somewhere... I am just not sure how or where to look.
Here are the voltages I was getting the last time I checked the board while it was plugged into the TV under load. (this is my first attempt at fixing a TV so please forgive me for my noobishness):
Pin 1, PNL_12V: 11.91v
Pin 2, PNL_12V: 11.94v
Pin 3, GROUND: 0.28v
Pin 4, GROUND: 0.27v (although ground, just posting my meter reading)
Pin 5, UR13.2v: 13.35v
PIN 6, UR13.2v: 13v
PIN 7, UR13.2v: 13.35v
PIN 8, UR13.2v: 13v
PIN 9, GROUND: 02.4v (again, just posting my auto range meter reading)
PIN 10, GROUND: 02.3v
PIN 11, GROUND: 02.3v
PIN 12, GROUND: 0.23v
PIN 13, AC_DET: 3.3v
PIN 14, PS_ON: 3.3v
PIN 15, BU5v: 5.04v
PIN 16, PNL_POW: 5v
PIN 17, PWM1: 13.3v
PIN 18, NC: 13.4v
PIN 19, DIMMER: 13.4v
PIN 20, ?: 13.6v
PIN 21, OFL: 3.4v
PIN 22, ERROR: This pin I tested a few times goes up and down 3v, 5v, 7v in no order. Basically bounces around.
PIN 23, PWM2 / NC?: 9.5v
PIN 24, STB: 9.5v
Appreciate all of your help.
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