Help after changing PRS-950 screen

Dear friends,

Fortunately I have found this forum and I beg your help if it's possible.

Some years ago I bought a PRS-950 E-Reader. I have been very happy with it but one day I found the screen broken.

I tried to contact Sony Official Support but no support is available so I thought that there was no possibility to repair my e-reader.

Surprinsingly I found a new screen at Aliexpress so I thought "why not" and, using the service manual, I tried to repair it.

It has been a hard work because the broken screen was really stuck with glue, but finally I have been able to change the screen.

The problem I am facing now is that when I switch the E-Reader on, the screen looks fine but only the top half of the touch screen works. It's a problem because I cannot select "OK" option to choose language (or any setting) so my E-Reader still keeps useless.

My question is if you think that there's a problem with the screen (In that case maybe another new screen would fix it) or if it's maybe a misconfiguration.

I cannot enter to the service Menu (I am afraid I do not have the right files) and I would really appreciate any help you could give me.

Thanks in advance.