A2289 liquid damage no image

[lincev]

Hi guys, I think the plate model is 820-01987-A but I'm not sure because I haven't been able to find the area where it is printed.

Logic board with liquid damage, I have checked the logic board with a microscope but I have not found corrosion, I have tested a screen and the LCD flex from board to screen.

I don't know how to continue or what measures they need to help me.

Thank you so much

 

[2informaticos]

Do you get 3V3/5V_S0SW_LCD?
Have you tested external video and USB activity?

 

[lincev]

hi, yes with external video everything is fine, I have another problem, the battery is not detected but it can be damaged, I should try a battery but first I want to resolve the image error

(only board with screen but without battery)
J8500

Pin44 PP3V3_S0SW_LCD=3,28v
Pin45 PP5V_S0SW_LCD= 5,07v

two measures 5-10 seconds when I connect charger, after 0v all time

 

[2informaticos]

DP_INT_HPD goes high, at same time?
Check diode mode to ground at EDP_AUXCH_N/P lines.