iPhone 4 - Blank screen, backlight only, water damage
After my iphone took a quick trip down the toilet i rescued it, dried it off and left it in rice overnight. 24 hours later I tried to boot it up, no luck, I conneted it to itunes and the computer did pick it up, and the phone made the usual noises, and even connected to my bluetooth headset, but the screen woud just not come back to life, it does however have a background glow when any buttons are pressed, so backlight must be fine.
I assumed the LCD must have been damaged but before I ran out to get a new one I dismanteled the phone (using an online guide), and transplanted the screen from a perfectly operational iphone 4, but still the same result, backlight only.
I put the good iphone back together, left the water damaged one in pieces and put it back in rice.
Does anyone have any other suggestions? surely the logic board isnt dead, there is no visible damage, corrosion etc.
Questa è una buona domanda?
3 Commenti
Take a look through all the answers for iPhones and you'll find loads of info on waterdamage... Most are fixable. Follow the advice on cleaning... It means this phone will last longer if you repair it. If you just replace the battery ( which usually dies with water... Hence the black screen) the rust/corrosion will slowly ruin parts. I'll find a recent post...
da pollytintop
Ps. I might have gone silly in the head... Missed the backlight comment!If you have still only got a background glow on the LCD but can see faint images it may be the backlight... Cleaning the LCD connnectors may fix it otherwise you need to locate the backlight coil. I only know 3g/s. If it's all black then it's likely the LCD. A very very good clean can usually fix these.(might take a few cleans)
da pollytintop
Thanks for your comments Polly, I cannot see any faint icons on the screen just a faint glow all over, I have tried transplanting the battery from a working phone, and no change, i have checked the LCD connectors as much as I can and see no damage with the naked eye.
As I have now confirmed all components effecting the screen (other than the logic board) are not causing the issue, by transplanting fully operational ones, I am unfortunatley left with the logic board as the cause. So will now clean the LCD connection points of the logic board with the advice below (thanks to Jerry and ABC) and report back with results.
da gavin