Sony KDL-50W685A horizontal black lines Pattern

[Raulnn]

Check the fuse on the t-con and see if there is any voltage on the t-con.

I think the LVDS cable is fine. The tcon receives 12v from the fuse, even in the sub-sources there is voltage. I can see the 3.3v power supply from the dc dc converter

[Diah]

remove the bezel and inspect the screen side glass if there any damage

[Raulnn]

remove the bezel and inspect the screen side glass if there any damage

Thanks! No. I have disassembled the frame and it is perfect. The problem is with the tcon, DC DC converter area, but I don't know how to test if the converter is okay. the converter gets hot, the 3.3v and 1.7v test points are fine.

[Diah]

Thanks! No. I have disassembled the frame and it is perfect. The problem is with the tcon, DC DC converter area, but I don't know how to test if the converter is okay. the converter gets hot, the 3.3v and 1.7v test points are fine.

show here photo of the circuit you mentioned and mark on it the part u said it get hot

[Raulnn]

show here photo of the circuit you mentioned and mark on it the part u said it get hot

hello! In the photo there are several voltage reference points AVDD, VGL, VSS. these give incorrect values. however, the 1.2v and 3.3v benchmarks are correct. The supply voltage of that integrated is correct. I don't know if the problem is with that integrated part or with another component of that circuit.

[Raulnn]

Can you help me? I don't know how to differentiate a problem in the DC DC converter, or in some nearby capacitor. the converter is very hot

[Diah]

Can you help me? I don't know how to differentiate a problem in the DC DC converter, or in some nearby capacitor. the converter is very hot

this is non DC /DC... contact AUO in Taiwan and give them the last photo you uploaded--- they will send you free of charge 8 ribbon set of COF need to replace... but you need to have 6000 euro coast of COF install machine.

[lotas]

Check the resistance of test points CKM1-CKM6 at the output of this chip relative to ground.

[Raulnn]

Check the resistance of test points CKM1-CKM6 at the output of this chip relative to ground.

Thanks. I have measured at the test point with a black ground terminal.

CKM1: 83,5 Kohms
CKM2: 1,8 Mohms
CKM3: 1,8 Mohms
CKM4: 1,6 Mohms
CKM5: 1,6 Mohms
CKM6: 1,6 Mohms

[Raulnn]

this is non DC /DC... contact AUO in Taiwan and give them the last photo you uploaded--- they will send you free of charge 8 ribbon set of COF need to replace... but you need to have 6000 euro coast of COF install machine.

thank you. I hope you are wrong 😁😅😭

[Raulnn]

riddle solved. A flex where the integrated hood is located is damaged. Someone did a bad job and ruined it.

[Diah]

riddle solved. A flex where the integrated hood is located is damaged. Someone did a bad job and ruined it.

thus you call it flex.... its the COF which Taiwan could send to you free of charge

[Raulnn]

thus you call it flex.... its the COF which Taiwan could send to you free of charge

It's not the cof, look at the damage. but your hypothesis was the right one, because the fault is in the housing cof 😁

[Diah]

It's not the cof, look at the damage. but your hypothesis was the right one, because the fault is in the housing cof 😁

because of the COF overload can also burn the lines on flex