Smart tv Zephir no imagine

[labello]

Hi guys i have this kind of smart tv , audio is present , backlight is present too but no picture. I measured voltage on the pannel and seems OK.. but I'm not sure about that, I'll post the measurements. Thanks for the reply
VGH 36.14
VCC 12.24
VGL -8.890
VAA 13.30
(VDD 33) 3.3
VGL_TFT 5.977
VSSI -5.978

[labello]

No one...?

[Diah]

yours Info not enough, are the MB 3 in One or 2 in One ?

[lotas]

CV72690-B42 2 in One

[Diah]

also 2 in one, his T-CON on panel.. with oscilloscope capture the signal on LVDS Socket P+ / P- to be sure the SoC provide the signal.. if this the case then yours Panel T-CON need to inspect,

[labello]

yours Info not enough, are the MB 3 in One or 2 in One ?

What do you mean about MB 3IN ONE OR 2 IN ONE. THANKS

[labello]

CV72690-B42 2 in One

Yes the mainboard seem the same ov your picture. Of course I will donate it already done but not for the picture, but for guidelines that can help me to understand and find the problem. Thanks

[lotas]

What do you mean about MB 3IN ONE OR 2 IN ONE. THANKS

Two in one is when the motherboard and power supply are located on one board, three in one is when the motherboard + power supply and T-CON.

[labello]

Two in one is when the motherboard and power supply are located on one board, three in one is when the motherboard + power supply and T-CON.

Oh I see what it means, thanks.

[labello]

also 2 in one, his T-CON on panel.. with oscilloscope capture the signal on LVDS Socket P+ / P- to be sure the SoC provide the signal.. if this the case then yours Panel T-CON need to inspect,

oscilloscope I have only this thing... I don’t know if it's will work, thanks

[Diah]

oscilloscope I have only this thing... I don’t know if it's will work, thanks

i dont know, never used such device... show us clear high Res. Focused Photo on your Panel T-con circuit.

[labello]

i dont know, never used such device... show us clear high Res. Focused Photo on your Panel T-con circuit.

Hello , thanks for your reply, you mean to measure all resistence on the strip board pannel. Well there are a lot.. Ok I'll do it

[labello]

Hello guys all resistance seems okay, about socket lvds I didn't find any schematic to check the signal . It could be this..? Thanks again

[Diah]

yours Photo didn't help at all... need the total T-CON circuit include the LVDS socket

[labello]

yours Photo didn't help at all... need the total T-CON circuit include the LVDS socket

Hi okay I hope this will be okay. This tv doesn't have t-coan board separately. Thanks

[Diah]

first measure T-CON VCC on F1 from both side

[lotas]

Why? If the fuse hadn't been fixed, there wouldn't have been any output voltage on the T-CON, as in the first post.

Check the resistance at these test points relative to GND and the resistance between them, i.e. 1 pin to 2 pin, 1 pin to 3 pin, ....., 2 pin to 3 pin..... and so on, all combinations.

[Diah]

Why? If the fuse hadn't been fixed, there wouldn't have been any output voltage on the T-CON, as in the first post.

i know he wrote VCC 12,24, if there are load the reading of the F1 from both side will be different.. if the same then OK