Herald LCD replacement

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Hi !

I broke a couple of months my Herald LCD screen. So i bought a new one on ebay. Looks like this:


I removed the broken screen and i replaced exactly like this video
http://fr.youtube.com/watch?v=aN6cKRM2F1M

Now the LCD is 100% working but the phone is no more tactile
I wonder why... i think i've done all correctly.

If the LCD works, the thouchscreen should works too??! it is the same wire isn'it ?

Do you have any idea to fix it?

LCD work doesn't mean touchscreen should work. they are not same wire. look at the face of the LCD, there is a wire link to the back of the LCD, that wire is the touchscreen's wire, and then connected with mainboard by the flex cable of the LCD.
i guess there is two possible situation:
1.LCD is good but touch screen defect.
2.Some problem with mainboard.
According such situation, I guess 90% it's the touch screen has problem.