What is the black sheet on the lcd?Ok, so firstly I broke my lg g3's digitizer and bought a new one and tried to replace it. After a few minutes I realized that...
Answer to: My screen won't come on even though fully chargedWhat happens if you turn it off? If you press the power button for a longer time than normal it will power off instantly. I had something like that too but after I powered it off it worked. Can you put a photo of the arrow you are talking about?
Answer to: Back speaker not workingI`m not sure but there could be a broken wire, but that's ok because you can easily fix it by soldering it back. That happened to a lot of my speakers and it's a really easy job just be careful when you take it apart.