Hi, Firstly, this sounds like the ever common ‘Audio IC’ disease which affects the iPhone 7. A lot of the symptoms you say point to this. It is caused by flex of the board which causes a trace that goes to the Audio IC (Pad C12.) This causes the phone to take a very long time to boot and 99% of the time results in the voice memo app not functioning, but also most of the other issues you described. This will need a Level 3 repair by someone who can micro solder to run a jumper along the affected trace to repair it. You might be able to find someone local, but there are some great mail-in services that are great at this. You can read more about this here: https://www.discdepotdundee.co.uk/iphone-7-audio-ic-disease-loop-disease-repair/ In regards to the other issues, it could still be a faulty LCD module, but would have to try with a known-good part to verify. The audio IC fault has also been known to cause touch issues as the trace that fails is also related to the touch circuit.
Well firstly I am assuming you mean Touch ID instead of Face ID. But it seems as if you have a faulty screen and the Home Button Flex with Touch ID connects through a flex built into the screen. I have certainly had faulty ones of these myself so you are looking at a new screen.
Sounds like it needs a new Charging flex as this is where the Back&Recent buttons are located on this model. If you feel you are competent enough you can follow the guide below and attempt it yourself. Although this is risky as the LCD is held on with fairly strong adhesive and since its already cracked there is a high chance of completely breaking it upon removal. Samsung Galaxy A5 USB power board Replacement Other than that you will likely have to take it to a local repair shop where they should be able to complete this repair.
Well unfortunately it sounds like a logic board fault, so as the data is stored on the logic board swapping this will not help in this situation. The only way another functional iPhone SE could help is if a part is stopping the board from powering up such as the battery. Which is possible but unlikely in this case, Sounds like you will need to speak to a data recovery specialist (There may be shops near you that can do board level repair to retrieve data, but be careful as an unskilled person could cause irreversible damage to the logic board). Alternatively there are a couple of online specialists I know of that do liquid damaged data recovery with a great reputation. '''https://www.ipadrehab.com/index.cfm?Page... https://www.ipadrehab.com/index.cfm?Page... Only issue is these services are $300
From my experience backlight problems are almost always logic board related, especially when liquid damaged. Although there is a slim chance this could be LCD related, but no way of knowing without a known good display to test with.
So sounds like it is Google Account locked. Also known as FRP (Factory Reset Protection). Obviously the easiest way to do that would be to try and remember the Google account that was used on the device, if you cannot remember the email you can go to https://accounts.google.com/signin/v2/us... where you should be able to find out your Gmail email if you put in either a phone number or another email associated with that account. Failing that there are plenty of ways to get past this if you just search the model number followed by FRP bypass on Google as long as you are the owner of the device.