Phone does not charge after battery replacement

I replaced battery of my Samsung Galaxy S6 edge. Before putting the phone back together (just before reinstalling midframe) i tried charging the phone - it worked. However,

1) when I reinstall the ‘midframe’, the charging STOPS. I tried it multiple times to get same result.

2) I managed to ‘SWITCHED ON’ the phone by holding the main screen/battery assembly and midframe at an angle to each other and by pressing the the ‘Power button’. BUT as soon as i push the entire midframe in place, the phone ‘SWITCHES OFF’.

Is the midframe causing any short-circuit? Has anyone come across such an issue. I spent a lot of time around it but could not make it to work. Any help will be appreciated.

Thanks,

Jay