Ipad Mini 4 A1538 Screen Digitiser

Hi and thanks for any help.

I have several questions.

# I replaced the battery in my ipad mini ok, but I messed up the screen/digitiser. How can I find out what it is that I am doing wrong? I was very careful removing the screen, and had an extra pair of hands while I undid the incredibly tiny screws. When it was put back together the colours are washed out, a band of different colour, and it flickers like crazy on another part of the screen. Also there are black ink blobs under the glass in the corners which you can move about but can't make them go away. I'm sure the screen/digitiser is dead (please prove me wrong ??) but I would really like to know what I did that broke it.

1. I saw on here a replacement screen which I am willing to buy, but I can't find the ad now ??? I remember though that it comes without the home button (because of fingerprint recognition) but I would really like a screen complete with the button. I have never been able to successfully solder anything. Is it possible to get the screen with the home button already in it?
2. I also saw that the screen was clear glass, whereas my screen is attached to the black digitiser and is all one item. Am I looking at the wrong thing or is the ad showing the screen as clear just for clarity?
3. I also saw a video which showed you how to solder in a home button and how to strip down the ipad mini. Can anyone find where these videos are?
4. That's all folks :)

Lee