No response to pen - new part needed ?

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I gave my SPV M600 to replace scratch on screen, they opened phone and remove foil, when they place new foil phone work but don’t respond to pen, phone is working but I can’t do much without pen.
I want to buy new part but I don’t know what to buy.
Do I need new LCD or Touch screen ?

Please see these link and tell me what to buy
Touch screen http://www.phoneystore.com/product.asp?id=113675
Replacement LCD http://www.phoneystore.com/product.asp?id=114325

Best regards from Belgrade and sorry for my English.

If the screen works, but doesn't respond to touches, only the touch screen is required.

Sorry but I have quite the same probleme, my Prophet is a little damaged at the right part of the screen (with pen, because of grab-and-scroll) and won't respond anymore. I'd like to change some parts, but in this case is it touch screen/lcd screen or both ?

Thanks for your help (Sorry for my english, I'm French)