No backlight after unlock phone (backlight work during boot)
Hi guys,
recently i repaired iPhone 6 water damaged.
I replaced PMIC, after then phone boot but there are not backlight and touch. I replaced:
- backlight IC
- backlight capacitors
- touch ICs - MESON, CUMULUS
- LCD IC - CHESTNUT
Now after press power button, phone boot with backlight and work normal. When i lock phone, LCD goes off, but when i want unlock phone there are not backlight. Touch and LCD work.
My question is:
Where can be problem? It look, backlight driver do not receive ENABLE signal after booting and do not want work.
Can be here problem with
45_AP_TO_PMU_AND_BL_DWI_CLK
45_AP_TO_PMU_AND_BL_DWI_DO
?
For what is there this bus?
Sorry for my bad english :)
Thanks
Is this a good question?