Thank you for the guide, I also skipped from step 4 to 34 and managed to replace the battery with no issues. The glue remover was great and allowed me to clean the whole area properly after the old battery was removed.

Slight noise from one of my fans now though so I will follow the full guide again when I have some spare time and clean all the components as well.

https://imgur.com/SqTDXHA

I removed my screen to change the battery but unfortunately I wasn’t careful enough and nicked the display on one of the corners resulting in a dead screen now.

I can replace the screen np, but I was wondering, I should be able to still connect my phone to my PC to check it is still working right? Because I have it connected now but there seems to be no power at all and my phone isn’t connecting to my PC to do a full backup. I have double checked all connections and held the power button in to try start it up or will it not start up if the screen is broken?