LG Rumor Screen. My son has the LG Rumor thru Sprint. He came home today and the screen is all

Question

My son has the LG Rumor thru Sprint. He came home today and the screen is all messed up. It is all warped and keeps blinking. I called Sprint and they told me to reprogram the phone which did not work. Now they're telling me I have to take it to a Spring repair dealer. Is there some way I can fix this myself. I tried taking out the battery and replacing it but the phone still is all messed up. If it is in text slide position however, it is normal.