Why does the backlight flicker after screen repair
I do between 4 and 5 iPhone 4 and 4s screen repairs each week and have been running in to the same issue over and over. Before I do a repair, I test the screen that I am going to use for the repair with a tester cable and old iPhone. The screens appear to be fine when I run the test, but after I install them on the customers' phone sometimes the back light flickers. I try to be very careful with the digitizer and lcd flex cables, and have even started pre-bending them on the dotted lines assuming that I must be damaging them during installation, but they are still flickering. Has anyone else run in to this problem?
yes i have seen this problem a lot!!!! also test is before install. once its in place its start to flicker.
all you have to do is wait... about 1h-6h and the flickering has gone (in 99% off the cases). don't ask me why...
in my opinion its the low quality of the screen. and yes i buy "original" parts but that just a name. different suppliers give different screens,... the also seem to come in batches. sometimes the whole batch (100-200) screens give flickering, some times none of them...
suppliers keep talking about static electricity, we work esd safe so i thing the quality is the problem
hope someone know's what the real problem is...
I agree with iwillfix.
I found that original lcd (the one with the black stripes left and right only have this problem extremely seldom.. but the copy/half original LCD on the cheaper displays have this problem much more often.
a burn-in of about 15 minutes to several hours will fix this problem most of the time.
Since we offer to repair the displays within 30 minutes for our customers.. i tend to buy the original lcd displays... but i tested a new supplier who said it is original but it is not.. ugh... so i have to write a formal paper now to inform my customers about this burn in procedure...