Chosen Solution
Hi, My iPhone recently had a bit of a bath which seemed to kill it. I left it in a bag with some silica crystals to dry it out for a few days. Once I tried it again, the phone did turn on but had no screen! The touch wouldn’t work and showed nothing, BUT, the backlight was working. It would ring and iTunes recognised it. I bought a replacement screen and some isopropyl alcohol (99.9%) dismantled the phone, cleaned the top of the logic board which showed some signs of corrosion, fitted the new screen and it all worked apart from the backlight. I could unlock it so backed up with iTunes, then tried it with another LCD and the same happened. So I dismantled it all and fitted the original screen, and it worked perfectly! Touch screen, LCD, backlight, everything! Now, the original LCD had some water marks and damage so I refitted one of the replacement screens and again, no backlight! Is it likely that the two replacement screens I have bought, both have faulty backlights? Or that my iPhone is frying the backlights in the replacement screens as soon as they’re fitted (not original Apple products)? Anybody have any experience with aftermarket screens backlights not working? Many Thanks Chris
replace the IC and Coil and trace back the backlight line on board you can get the coil and backligh IC here for iphone 4 and 4S
yes it does, my advice would be to reheat the board, just enough for the solder to make its connections, then leave for a while for the board to rest hopefully this should work, if not it could be the ic needs replacing, let me know how this goes, if it doesnt work, ill show you which ic to replace
