回答“squares on the screen after battery replacement”Thanks guys. I had the same issue after I did a battery change. I went back in after reading this and found glue debris from the battery was in the digitiser connector. I pulled out the glue and put it back together. The squares are gone. Check the connector on the left of the 3. It's long and skinny. If it's not connected properly it can get worse, like heaps of vertical pin stripes.