I think being an engineer is really much of a pain sometimes.
My iPhone 4 is the best example. I feel that this 2 years old iPhone 4 that I've been holding on to seems to have became my 'engineering project'. On certain weekends, one of the parts seems to break.
Actually, I have been trying to fix the proximity sensor ever since the first knock-off screen replacement, which was $170, after the original cracked. I remember I once changed the screen to a white coloured and the proximity sensor worked fine! But the screen wasn't IPS tech whereby looking at the side would cause the colours to be inverted.
Back to the proximity sensor, parts always broke due to me trying to fix that particular problem, especially the screen.
So now, before this weekend, I had 2 parcels which contains the UV filter for the proximity sensor and also a battery replacement.
I was hoping that after installing the UV filter and then replacing the new battery, the proximity sensor would work and the battery would be good as new.. who knows it turns out this big big problem...
Yes, that's the battery connector. Obviously without that I can't insert my battery and thus the phone would not power on.
The problem isn't really that annoying but I realised that one of the solder pad, which is actually a conductive material has been ripped off together with the battery connector. Now that is annoying. Without that pad, the circuit is broken.
I've had success soldering the other 3 pins (4 pins total), and the phone would power on fine but it wouldn't charge. So if it can't charge, the battery is totally useless, together with the new one I bought.
I read that there is a small circle behind that pad and I could just solder the pin on to that. Problem is my soldering iron's tip diameter is too large! Couldn't fit and there's a high chance to damage other components if I were to force it.
So now, if I really have to restore the battery, I have to buy a smaller tip diameter soldering iron to fix this problem....
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