I was using adb shell when phone was in philz recovey mode. It was in that state for around 2 to 2.5 hr. It was connected to PC through USB cable and so was being charged as well. After that I noticed there were vertical colored lines across the screen (this I had seen some one else also faced charging the phone while its switched off on cyanogen mod). This is temporary though and goes off if the phone is swithed off and kept aside for sometime (am not sure if there is any longterm effects). Has anyone know why yhis happens?