neo geo graphic issue

[Birons]

Hi, i have this defect on my neogeo aes pcb3-4 palB, see image link.
Thank u
https://postimg.org/image/3vyzllxh1/
Https://postimg.org/image/9yb7pubat/
https://postimg.org/image/gq1msp0ad/
https://postimg.org/image/rffbkyc39/
https://postimg.org/image/e9zteui7p/

 

[pnauts]

The fix layer seems good. visible on your link

https://postimg.org/image/e9zteui7p/

because the number over the sprites seems correct.
Does the missing part move with your sprites ?
I would consider bad data traces from the CROM.
check the pins between all GAD0~GAD3, GBD0~GBD3 lines data from your cartridge socket to your NEO_B1 chip.

 

[Birons]

The fix layer seems good. visible on your link

https://postimg.org/image/e9zteui7p/

because the number over the sprites seems correct.
Does the missing part move with your sprites ?
I would consider bad data traces from the CROM.
check the pins between all GAD0~GAD3, GBD0~GBD3 lines data from your cartridge socket to your NEO_B1 chip.

Ok thank u!
Yes the dither effect is only on sprites but not on fix images.