Original post by: AGS ,
iPhone 6s No Image (no water damage) Display completely Black
Hi Guys.. I m here again for expert advises and for learn reparing :) My client sent me iphone 6s wth no image. The phone is second hand, so they dont tell me anything about phone history. I check with new display but the screen remain black, itunes recognize phone. I search on web and found this video https://www.youtube.com/watch?v=dYbW35dlGY0 Try to putout C4200. fortunately the first component (c4200) is shortage and i solve the problem. Obviously you are thinking, if everything is ok, why i m here, :))) I m here because i want to learn and understand how find the problem on the phone and not just solve the problem searching in net or putting out every component. My question is : In this case, which is the first step. Before searching on the web i check if the backlight is present, i check all backlight filter, check FPC connector if damage. MY proper question is this line DISPLAY POWER PP5V7_LCM_AVDDH must have 5 volt??? so i check a phone who run perfectly (without lcd / touch panel) If there is no problem in the phone, i find 5 volt here (c4200)? Which is the right way to proceed in this case, if i have only schematic and not INTERNET :) Thanks a lot for attention.