[SOLVED]820-2936 white screen

[geraymartha]

i got a water damaged 820-2936 with destroyed lcd connector , resistors and caps around lcd connector very bad shape , and other corroded stuff , i replace everything that was looking bad , including the lcd connector , now machine power on , i hear the chime , mouse lights , ram reset is works , but i get no display only a white screen, no question mark folder , no nothing else , i did triple check lcd connector pin by pin.

where i can start?

 

[geraymartha]

never mind about this one U9000 was damaged , nothing was getting to L9004 i replaced and rebuild a trace for the enable and now i get display , I'm very confuse , i did have the idea that without voltage on l9004 i will get nothing on the lcd , and on this one , it did light and have a white display. anyway its fix.

 

[geraymartha]

hello before closing this i want to share that LVDS_IG_A_DATA_N<1> pin 11 on the lcd connector at the end was not solder right and i was getting dots on the apple , like purple dots , around it , and around the loading bar , so i guess triple check needs one extra check sometimes.

so PP3V3_LCDVDD_SW_F was missing and found that solved this white screen.