Chosen Solution

Hi everybody, This is my first question right here. I’ve been looking for an answer to my problem but couldn’t find it. I have two Iphone SE (one is mine and the other is my cousins). My phone didn’t turn on after a screen changing. My cousins phone worked but the battery didn’t charge at all. I could open them and see them under the microscope. Both of them had the FL2400 removed. I tried to solder them back but didn’t succeed and lost them. So i shortened the pads of the FL2400 with a wire. Doing so, in my cousins phone i lost the C2400 cap. So the result is this: My Phone: FL2400 pads shortened with a wire and C2400 soldered. My phone doesn’t turn on and Itunes doesn’t recognize it. But i measured the current and is around 100-200mA.My cousins phone: FL2400 pads shortened with a wire and C2400 not soldered. That phone doesn’t turn the screen on, but it is alive because Itunes recognize it. So the question is, do i need to solder FL2400 and C2400 and may be the phones will work? or the problem could be elsewhere. Thanks!

Fl2400 will need to be in place the cap doesn’t really matter, did both phones have the battery disconnected when you connected the lcds