Switched to chinese LCD, ruined something
I switched to a chinese LCD after I broke the original one. It didn't work so I put the original back in and even since then the phone behaved weirdly.
Everything else worked but it was slow. Mute vibrated a couple of seconds later than it should, sleep put the phone to sleep with an enormous delay and for the home button to work you had to hold it for a while.
I took it apart and checked the connections + pins which seemed alright. Then I turned it back on, it was all the same. As I couldn't make out anything from the screen, I switched the mute on to see if it had already booted. It suddenly started to vibrate and wouldn't stop and the screen started to color black from the left top corner to the right, adding lines. It looked like MSDOS booting up, only there was no text, just pixels. Then I got a white screen and the phone kept reseting every now an then, varying from every 20s to 2mins.
Then the battery went off so I plugged it into a pc but no success. Now the display stays off, nor does it glow, not even the digitizer works. I did all the possible resets I found online, nothing fixed it. Itunes recognizes it, vibration motor works perfectly responsively, sound plays when I call it from another phone, even the home button works (it will hard reset when I hold the two buttons yet when I hold only the sleep button nothing happens)
I understand there are some chips burned in the motherboard, as I might have hotswapped the displays since I didn't know whether it was on or off.
What about the Display interface chip? Can I just switch it?
Could you give me advise how to go about it?
Is this a good question?