I have a persistent problem. I have a PSP collection and they are all impeccable. However, I have one that I actually use and this one is giving me a headache. There are already 5 displays changed on the same PSP and they all show stripes of different shapes after a few months. This time I removed the double-sided tape that is underneath the microphone. I'll see if the stripes appear again after a short period of time. But I believe it was the double-sided tape under the microphone that pressed and contaminated the sensitive crystal chip on the display. I replaced the tape that was already sticky with epoxy resin. It was good for now.