Need help with 6plus no image

hello,


here is the story of the phone. i am the second (third?) hand on it


first it has water damage, dead phone, no response

first technician have :
- desoxydise it
- remove messon (don't know why???)
- change chestnut (don't know why too)


at least , don't know if anything else


i have received it


it had short to ground on PP5V7_LCM_AVDDH, C2094 was faulty, remove it, then 6plus start on, display and backlight ok


so i tried to put messon (i think it was good but i have done it not very times)


then phone start on power supply, no short but no image, no backlight !


remove and change chestnut many times and remove and clean messon : the same


i don't understand, i have check all diode measures on J2019 and i have all of it but a trouble on this line :


-PN5V7_LCM_AVDDN !



the measure shwos : sometimes 1340 (in fact after discharge the line to ground), and when i take the measure just after i have OL or a rising number from 1000 to OL


i have this measure on all the caps of the line, before and after filter , and also on the line under the screw hole.


can anybody help me ?


thank you all

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