The digitizer is the touch panel that sits over the LCD screen.
The digitizers job is to detect and map your fingers movements across the screen and let the iPad know where your finger is.
They rarely malfunction but are very susceptible to impact damage, scratches and cracks
Common faults / issues with digitizers that will require this repair include:
- Touch panel no longer responding - if you can see the picture ok but the device is not responding to touch
- Touching the panel causes unexpected or erratic movements - this will require a replacement digitizer.
- Impact damage - glass digitizers are very easily damaged, generally they will crack or shatter - depending on the extent of the damage it may still work but is not advisable due to safety.
- Scratches - plastic digitizers are very susceptible to scratches, several light scratches build up making the iPad look tatty and harder to view
As the digitizer panel sits directly above the LCD panel some impact damage can also cause damage to the LCD this repair is avaiable too.
The general rule is that if the screen is cracked but the device is displaying a picture as normal you will just need to replace the digitizer.