Peter N

A customer of mine left this iPhone 8 with me. It is boot looping. I have inspected the motherboard, and it has strange...

Hi, I have an iPhone 6 that was draining its battery very quickly. I first changed the battery in hope this would fix the...

Hello, One of my customers brought in an iPad 3 (A1416) to me with a battery fault. It was completely dead when it...

Hello, I have changed the microphone / charging port on my S6 Edge. Now the microphone is very fuzzy and people can barely...

Pretty sure you have to use the display port instead of the HDMI port

The update might not be compatible with your iOS version. Try updating your phone to the latest software. I recommend backing it up first though. iPhones have a tendency to fail during updates resulting in loss of data, although it is not common it can still happen. Best be safe by backing up your data beforehand.

The red screen usually means there is a fault with the front camera / proximity sensor flex. Try disconnecting it, then boot the phone. If it boots as normal you will need to replace this part. iPhone 5s Front Facing Camera and Sensor Cable Replacement

Do any of the capacitors seem dark or burnt up on these lines? PP_SOC_VAR, PP_CPU_VAR & PP_GPU_VAR have very low resistance, most multimeters will beep on both sides because of this. So you may not have short. There is a still possibility heat has gotten through to the other side of the board and caused a short under the CPU or baseband CPU. I would never reflow an audio IC on the iPhone 7. The problem normally is a broken trace between I2S_AP_TO_CODEC_MCLK and pad C12 on the audio IC (usually caused by a drop or a bend). Reflowing the IC normally wouldn’t reconnect this trace. I always remove the audio IC and repair the trace at pad C12 (also check F12, H12 & J12). Then reball, then resolder the IC. Repairing this trace provides more strength and would stop the problem for occurring again (in most cases).

This connector can be replaced, although it is difficult. You would need to send it to a microsoldering specialist. I would recommend this option rather than replacing the motherboard. This way you can keep all your data on the phone.

Did you disconnect the battery prior to fitting the screen assembly? If it was still attached, you have most likely blown a filter beside the connectors. Have a look around the connectors, usually the filter will look darkened compared to the others or burnt up. It would need to be replaced in order to get the touch working again.

Take the board back out and inspect the WIFI / Bluetooth IC and surrounding components. It’s the one marked in orange. Check for any cracks, damage or missing components. It may have been damaged if there was something loose underneath it when the board was put back in while replacing the charging port. In my experience after replacing this IC the WIFI should work again.

I would try a new charging port. Why did you replace the motherboard?

Unfortunately this is not a modular component. It requires soldering to replace. Similar to the iPad Air and Mini charging ports. Here is a long tutorial if you want to attempt it. https://www.youtube.com/watch?v=Ia2VkdfX...

After removing the charging IC (U1401), reballing and re-soldering back onto the motherboard. Now the phone is working perfectly. The phone no longer reboots after I power it off. I hope this will help anyone else with the same problem. I guess replacing this with a new component would work also.