i would like to seek your kind assistant & help. My nokia Lumia just fall off & No Crack on the screen. only dead pixels on the screen.
question : what parts should i purchase to replace this screen?
Take it apart, check the connections. It's possible something is still partly connected but loose. If that doesn't fix it, you likely need a new screen. Because you don't repair phones for a living and don't have all the expensive equipment for separating and joining these parts, you need the entire glass/screen/lcd/frame assembly. For the 920, I've seen those at around $30 on ebay. Example: Front Full LCD Display Touch Screen Glass Digitizer Frame for Nokia Lumia 920 | eBay (just an example not an endorsement or recommendation of the seller)