Temporary image sticking can result from maintaining a fixed pattern on the display for an extended time. This can cause failures in Display test and should be avoided. As a guideline there should be a 4x time recovery allowed between any fixed pattern and a display test. If a display fails for a residual image or non-uniformity, failure analysis should follow the below procedure: •Check after 4hrs hold • If pass return to line • If fail check after additional 4hrs • If fail unit should be rejected