Chosen Solution
Hey! I have an iPhone 7 with no service issue. I am a micro-soldering technician but I am new to it. The iPhone does not show IMEI and putting a sim card into the sim port does not change or affect the status. I am wondering if I should start at the baseband or the Qualcomm chip that I hear normally fails. Thanks for your answers and I hope you have a great day! ————————-Edit————————- Based on my readings, the capacitors around the chip are shorted. I assume that it’s the chip and not the caps themselves (I’ve tested 6 of them). ————————-Edit————————- Removed the chip successfully, shorts and cleared and upon further inspection of the chip there is a bulge on it which I call: “The fry mark”.
I would start at the Baseband PMU if it is a QUALCOMM unless it has an audio IC repair done which would point to the Baseband CPU. If it hasn’t had the audio repair I would suspect the baseband PMU has suffered an electrical fault thus sending the wrong voltage to the baseband CPU making the phone unfixable as the baseband CPU is married to the phone.
Has this phone been hooked up to a carrier before? It could have been a display phone and it cannot be hooked up to service. Update (04/30/2020) It should looks like it was a display, it doesn’t have a IMEI number. So I would bet with a 99.99 percent possiblity that it was a display. They do that so people can’t steal them and hook them up.
