iPad 4 after Digitizer replacement some areas don´t react

Hello guys,

i replaced my iPad 4 front panel after it was broken but now i have the problem that the new digitizer only reacts at the top and bottom area, in the middle of the screen it doesn't response. I thought the Digitizer is damaged so i took a new one but same problem only in different areas.

What can it be? Is it again maybe a damaged digitizer or maybe a short circuit some where or something else?

Really appreciate if you can help me out.

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crwdns2931729:0crwdne2931729:0: Sun 11, 2016

crwdns2933897:0crwdne2933897:0

Most likely the digitizers your using are from third party vendors, and you're having third party problems. I would try a quality digitizer. It is possible that you've damaged the alligator connector, while assembling it

iPad 4 Screen Digitizer Assembly