iPad Air - Completely Dead!

Okay guys so I got this iPad (A1475) from a neighbour who said the charging port was broken and the home button was too.

It constantly asked you to plug in a charger even with one in, and the port was extremely loose so I soldered a new charging port on there.

After this was done I put it back together and turned it on, I this time time got the charging icon, but leaving it on charge did nothing. I accidentally booted it without the battery screw in, so the pins were just laid on top. Weirdly this worked, but it would boot loop every few minutes, and the battery wouldn’t go past 3% it would just change randomly to 1,2,3.

After taking it all apart and re assembling many many times I am at a point now where it just doesn’t do anything.

I couldn’t do DFU as the home button didn’t work, so I ordered a new digitiser with home button hoping that would be my saving grace however it made no difference, just a black screen.

I am at the point where I am going to bin it and wondered if anyone had any ideas? I am unsure how to test the battery with a multi-meter, prodded around, reads 3.06v. I dont have a power supply so can’t test anything directly with the logic board!

Any help would be greatly appreciated!

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