Parts missing from logic board.

Hi,

Recently I've bought an iPhone-5 that was working normally but the display had problem. I know a little repairing and not an expert. When I opened I've found that there is a diode connected somewhere close to (Schematics- DZ9 and J6 leg number 8) and somehow its got disconnected while I was working and after that the phone is not turning on. Then I was looking through the logic board with schematics and found out that the following parts is missing (Schematics code- C355, DZ9 and Q2) I've no idea how it was working with a external diode someone connected must be very expert. I need help to get the phone live again, please anyone let me know how I bring the phone back in live. I'm attaching all the picture please help me.

Thanks very much

iPhone-5_N41_schematics.pdf