If you have a multimeter, start by chemcing your battery voltage. It should be at least at 3.7V to turn the phone on Do you have a usb amp meter? If not, then connect it to iTune to see if the computer detects it. If so, then you know the phone is at leadt turning on and that you have no image instead. Let us know what you find

It sounds like the volume flex cable is damaged. I’s have to doublecheck, but I may connect to the power button, flash, and vibrator. It has been a while since I’ve replaced that part. It’s fragile and is installed around the battery. I hope this helps

Hi, Do you have any testing equipment? Multimeter and a usb amp meter would be very usefull. If you simply want to wipe the phone before recycling it, then one thing you could do is extract the motherboard and drill a hole through it. I hope this helps

Hi, I don’t see thosr console too often at the shop, but I have a vague memory of having one of those consoles that had an issue with the screen flex cable that would get compressed when the top screen went into it’s last position. I don’t recall of we had to replace the screen or only reposition the flex cable. I hope this give you a trail.

Hi , There is not too much that can affect the speaker volume. Since the volume is working, but just low. It is most likely one of the following. Blocked airway at the speaker grill Damaged speaker Poor speaker to port flex cable connection I hope this helps

Hi, Either the hole where the sound goes through for the mic is clogged abd would need to be cleaned out, or water got into the mic and would require it to be replaced. Let me know if you have any questions

Hi, You seem to have more then one issue I would reccomend to back up important thing and facotry reset to phone to resolve any firmware issues. If the back camera and flash still does not work, it is likely that the back camera is physically damaged and would need to be replaced. This will often fix the flash problem too I hope this helps

Hi, A very common issue with the iPhone X series and 11, is a tiny bit of water landing on the proximity sensor. This usually causes the phone to reboot all the time. The proximity sensor is on the flex cable that has the earspeaker attached to it. Simply disconect it, and leave it disconected for now. Boot the phone and see if the phone still reboots after 3 min. If it does not, then that is probably the issue. Replace the proximity flex cable. Note: the proxi is part of the faceid circuit and you will loose that functionality, if you replace that part. You can transfer or repair the original proxi if you can micro solder. If disconecting the proxi did not fix it, disconect everything besides the screen, battery, and power button. Boot the phone and test for bootloop. If the bootloop is gone, start recconecting parts one by one while testing for bootloop. You will find the part at fault. If it still bootloops disconect the power button and connect the port instead, and prompt to boot via the port and test...

Usually by holding power/volume up and sometimes the home button. Hold until the device reboots, keep holding and a recovery menu should open. You can use the volume down and up to navigate the menu, and power to select. Look for factory reset. Note: you may need your google account info to finish reactivating the phone after reseting the phone in this way. You could get locked at that stepped without it. Other note: button combo is different for all devices. Do a quick search on google for your model and hard reset. I hope this helps

Concidering that the battery was working for a while after the installation, there may be a defect with the battery. There is also a good chance that the battery is not connected properly. Possibly the data line of the battery which would cause odd issues as you’re describing. If you still have the old battery, it may still be able to charge a bit. You could use it to confirm that the new battery is at fault if it charges more then 4%. I would try to reconnect the new battery first. If none of those seems to work, there is a chance of damaged motherboard components, or partial damage to the charging flex cable. These are less likely since the watch was working for at least 2 weeks after installation. I hope this helps