Yin Yang Screen – Screen Image Normal – Left and Right Colors Inconsistent
Fault analysis; The main reasons for the appearance of positive and negative screens on LCD screens are as follows
1. COF damage, this type of situation is usually solved by replacing the corresponding
COF on a screen with two COFs on the X-axis, where the image changes color due to COF heating damage.
2. Soft screen cable damage occurs on the split board,
and the connection cable between the logic board and the edge board oxidizes, has poor contact,
or was not placed in the correct position during assembly.
Remove the screen cable and focus on checking the electrode position.
It can be cleaned with alcohol or wiped clean with rubber. If the cable is damaged, replace it with a new one,
3. Damage to the side panel, oxidation of the side panel cable socket,
and corrosion caused by liquid ingress can all lead to the replacement
of the corresponding side panel for the anode and cathode screens.
4. The logic board is damaged, and some of the logic board main chips
(BGA) have virtual soldering and looseness, causing the fault to occur.
The BGA soldering station can be used to re solder and repair it.
If there is no soldering station, the logic board should be replaced
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