Announcement

Collapse

Announcement

Welcome to the NEW iPad Rehab Forum! Everyone is welcome to read posts and learn for free. If you'd like to post your own question on the forum, please click "register" above or go here: http://forum.mendonipadrehab.com/register to enroll as a paid subscriber for $29/mo for unlimited access to our forum support and private signature failure section.
See more
See less

iPhone 6s No BackLight

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • iPhone 6s No BackLight

    I have a iPhone 6s Board shorted to ground, found the short on C4023 and at u4020 the big cap and backlight driver chip so I did a backlight rebuild Replaced the D4020, D4021,C4023 and U4020 , BTW when I pulled U4020 A1 and c1 was pulled pad so I did a jumper, C1 was easy since there is a trace bsides the pad ( I also check continuity on the LCD connector after) and A1 I did a jumper on the C4023 on anode side. so the phone booted but I don't have backlight,I cant seem to find the reason why, I have image but no backlight,

    I Also check the LCD conector on Diode mode
    PP_LCM_BL_CAT1_CONN - 590
    PP_LCM_BL_ANODE_CONN - 481
    PP_LCM_BL_CAT2_CONN - 590



  • #2
    If the short was so severe that you have to replace both the diode and the chip, then you should also replace the coil.

    Comment


    • #3
      Just changed the coils, Got back light! Thank You Jessa!

      Comment


      • Jessa_the_Professa
        Jessa_the_Professa commented
        Editing a comment
        excellent! With the 6/6s when you have any anode line short, suspect that coil damage has happened from the brief time where a massive 22v anode voltage was short to ground (heat! fire!!!!!) until the diode blew, breaking the circuit. Remember, it's never the coil---unless it is always the coil. In the case of anode line short, you will always get coil damage unless the diode blows instantly.

    • #4
      Thanks for that tip! BIG HELP! You really are the reason why my repairs are in a whole new level! I really appreciate what you do!

      Comment

      Working...
      X