Sony KDL-46ex700 led replacement still same issue

[Diah]

take the screen out.. and never put it back unless yours BL remain on always.... tv will work with out screen too

[labello]

take the screen out.. and never put it back unless yours BL remain on always.... tv will work with out screen too

I just thinking the same way but im not sure of that tv staying on if I will unplug the tcon board or the flex of the pannel...🤔

[Diah]

I just thinking the same way but im not sure of that tv staying on if I will unplug the tcon board or the flex of the pannel...🤔

T-CON should be in the circuit connected.... only the panel out

[labello]

T-CON should be in the circuit connected.... only the panel out

Hi i can confirm 2 strips led doesn't work. Now i'm going to swap the left with the right to have the real result. About problem of 2 strips or problem on the board

[labello]

I'm here again, so I already inverted the strip and I have the same problem so the problem is on the board. I took some measurements and on the side of working both strips led i have almost 240v (both)120 one and 120 one. The other side where leds doesn't work in have at max 40v (80 both). The colours of the wire of bad side are 2 blue... the good side the wire are red.. That's a real challenge 😫

[Diah]

I'm here again, so I already inverted the strip and I have the same problem so the problem is on the board. I took some measurements and on the side of working both strips led i have almost 240v (both)120 one and 120 one. The other side where leds doesn't work in have at max 40v (80 both). The colours of the wire of bad side are 2 blue... the good side the wire are red.. That's a real challenge 😫

wrong from me , the small socket LED+ for all.... and large socket 2 are LED -

[labello]

wrong wiring... you have 2 channel each Chanel / side should be one blue led - a one red led +

Nope... i didn't touch anything. I would like too if that was the problem but im afraid the clips can't be exanged. ..(see picture) One is a bit less than the other.. maybe I'm wrong, but probably there's some component that cause this problem..

[labello]

See they can't replace in a different way 🤷♀️

[Diah]

See they can't replace in a different way 🤷♀️

this i know .... show yours strips socket

[Diah]

i was wrong and i correct my last post,,,,, small socket are LED# and the large socket both are 2 lines LED-

[labello]

this i know .... show yours strips socket

You mean the clips i check already they are good and 100% like the original.. i really thinking about this component (mosfet) that could be defective...I mean in the circuit its going to protect himself....🤔

[Diah]

You mean the clips i check already they are good and 100% like the original.. i really thinking about this component (mosfet) that could be defective...I mean in the circuit its going to protect himself....🤔

you need to undestand what i am talking
you have 2 soclets both are correct no need to do any for them..
the small socket have blue and red this both LED + connected to gether..
the large socket have also 2 one red and blue... this lines are each out LED - now the red on this latge socket working.... but the blue not.... you need to flip the PSU and follow the track line of the blue one you will have Diode and many other sync smd R need to check if one open

[labello]

you need to undestand what i am talking
you have 2 soclets both are correct no need to do any for them..
the small socket have blue and red this both LED + connected to gether..
the large socket have also 2 one red and blue... this lines are each out LED - now the red on this latge socket working.... but the blue not.... you need to flip the PSU and follow the track line of the blue one you will have Diode and many other sync smd R need to check if one open

Yea .... I was thinking about reverse engineering, by following the road back...Tomorrow i will also back pannel in place. I'll let you know. Have a good evening for now thanks

[labello]

Hello guys I finished to take a look around diode smd and resistor smd , no open circuit, the only strange measurements that I discovered is in component that i mark red circle on picture, I only have one measurements i don't know if it's the anode or cathode, the other around it i have anode and cathode. So I suppose it's could that the problem..? Thanks for your answers

[labello]

Hi guys I'm back. So the tv works again, thank you so much for your reply guidelines and time!Then I wanna to say Happy new year to all of you 🎉

[nomoresonys]

Well that's good, can you describe the solution? Or did you give it? All I read was it's working now.

[labello]

Well that's good, can you describe the solution? Or did you give it? All I read was it's working now.

Yes at last wast bad connection of the negative rail including the little capacitor on the secondary side

[labello]

Well that's good, can you describe the solution? Or did you give it? All I read was it's working now.

Hi.Yes at last wast bad connection of the negative rail including the little capacitor on the secondary side. That's why I didn't have any power on the one side of led..

[nomoresonys]

Grazie.

[nomoresonys]

looks like Diah was on that path in post # 47. Bad soldering is often overlooked. More than once even, my bad soldering that looked good was the issue.