Hard reset it or the screen is bad.
Yea it sounds like it is just not connected to the LCD. I can't emphasize enough thought to be absolutely sure it is not the LCD. Personally, I would not go by two LCDs not working. I would try the replacement LCD in another iPhone 4. If it works there then I would be certain the LCD itself is not defective.When I magnify, what should I be looking for? and how the needle may help?
I don't have the skill to replace the connector, I would need some help from a technician.
Yes, iTunes recognize it, and it take calls normally.
The logic board isn't, per se. But if you have an open socket containing small contacts it's possible something--perhaps a bit of the connector's covering--is blocking the connection.thank you Michael!
Yeah, I was replacing the power button - not the LCD - so the only thing I may have done is to push hard on the flex cable that goes from the LCD to the logic board, but the technician said it was ok. I used some brush to clean the connector, but I have not did a closer inspection.
Only thing that concerns me, is that the logic board that sensitive to debris?
Funny thing is, same thing happened to me today. I dissasembled my iphone 4 trying to fix the home button not working properly. thing is i made sure every thing was in place but when i finally assembled it, the screen just stays black even tho you can notice the backlight turned on.
I plugged it in and itunes can see my phone correctly and i can hear music from it and watch photos so i guess the mainboard is not f'ed up. so i figured the conection between the lcd screen and the mainboard is not making proper contact even tho i made sure its connected properly (the 5 flex cables on top of the mainboard and the big one at the bottom).
If you guys got some suggestions i'd appreciate them since i live in Argentina and Tech support is Non-existant here for apple products.
PD: more funny stuff: i actually fixed the home button (since i can test it by putting the phone in sleep mode and pressing it so the backlights turn on) but its actually useless since i cant use it right? my luck i guess...