If most smartphones have recent screens assembled, that is to say that the LCD panel forms a block with the touch screen, there are still some models where the two can separate. This is particularly the case on many tablets ( iPad or Galaxy Tab ) or portable consoles too. The assembled screens require sharp tools and LCD separators not necessarily profitable for the occasional do-it-yourselfers, to be disassembled (as for example the screens iPhone or the last Samsung Galaxy) . In this case, whether it is simply a problem of tactile reactivity or of display, or even of cracked screen, there is no other solution than to replace the complete block of screen.
But on many devices, it is always possible to separate the screen from the glass, so it is interesting to identify the room to change depending on the problems encountered. How do I know if my LCD screen is broken? If the display is poor, if the colors are abnormal, black spots or color lines appear, if the display is very dark / light or totally black while the unit is vibrating or ringing (is lit. ). How do I know if I only need to change my touch screen? If there is a shallow crack, if the touch is difficult to react on an area of the screen or does not work at all, if there are too many scratches that make the device unusable.