Got no display iPhone 7 black screen of death
repair at AppleFixHamilton. There could be many reasons why iPhone 7 lcd screen gone
completly black.
o
It could be because of impact damage.
o
Battery connectors not removed while
replacing lc
o
Poor quality copy lcd used.
o
Electric discharge because of not
working on antistatic mat with ESD clip.
It could happen even if none of all of
above. iPhone 7 lcd screen use 20volts to lightup and sudden high power flow
can blow any of the backlight circuit component. iPhone 7 backlight circuit is
consist of resistors, capacitors, fuses ics and coils. First component to blow
are fuses in the iPhone 7 backlight circuit and these fuses are there for the
same reason so that any other component does not damage. If you are an iPhone
technician and carrying out iPhone 7 black screen of death repair first
components you will be checking are fuses. See below picture of an iPhone 7
backlight fuse is blown.
We
find out one of the fuse on iPhone 7 backlight circuit is faulty it was removed
and soldered new fuse and backlight come to life again. If you are fixing an
iPhone 7 with black screen problem check the below components first.
if
all of above fuses are working fine and still there is no display on iPhone 7
than it is backlight ic which is not working. iPhone 7 display driver boost ic
is u3 part name is u3703. failure of this ic is also a common fault. This is
not DIY repair. Even if you are a technician but if you don’t have micro
soldering skills don’t try it is difficult and more over you should have
knowledge to read schematic digram otherwise you might end destroying the
iPhone.
read further here
http://www.applefix.co.nz/blog/iphone-7-black-screen-of-death-repair/
