Touchscreen randomly not functioning after unlocking?

I replaced my iPhone screen today, however I am having some issues with the touchscreen.

When I am using the phone, the screen stays responsive and runs with no issues. However, if I lock my phone and wait for 20 seconds or so, the touchscreen will indefinitely not work upon unlocking the device-despite the actual LCD still functioning perfectly.

However, if I lock and then unlock my phone again immediately after this, the touchscreen will work perfectly without any issues; until I leave the phone locked for another 20 seconds etc...

So far I have reconnected all the flex cables between my new screen and the phone twice (no difference seems to be made) and I have done a hard/soft restart and a reset of my phone.

I hope that anyone could shed any light on this being either a software or hardware issue; as although it seems to be software related, this problem only occured after replacing the screen. No movement of the phone is needed for the touch screen to work/stop working, which just generally confuses me!

Thanks very much in advance for any answers! (:

(Sorry about my avatar... linked to my gaming accounts!)

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Did anybody find any solution for this? I am having the exact same issue after replacing the screen.

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Hello , Does anyone has solution to this problem? I am having exact same issue after replacing the screen.

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It's a faulty screen seen this issue before

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I've seen this problem once, faulty LCD.

Confirm by using your old LCD to test

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I have the same problem with my iphone 5 after replacing battery..

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hey Matt, how did you resolve your issue?

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put your phone battery to drain to zero... and then put it on charge after sometime .......... it works for me

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Matt estará eternamente agradecido.
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