HP 3030 HP LaserJet 3020 and 3030 All-in-One - User Guide - Page 101
The device control panel display has black lines or dots, or becomes blank
UPC - 829160074764
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The device control panel display has black lines or dots, or becomes blank CAUTION Static electricity can cause unexpected black lines or dots to appear on the device control panel display. Do not touch the device control panel display if there is a chance that you have collected a static electric charge (for example, by walking on carpet in a low-humidity environment). Was the device exposed to an electric or magnetic field? Unexpected lines or dots might appear on the device control panel display, or the display might become blank if the device is exposed to an electric or magnetic field. To resolve this problem, perform the following procedure: 1. Turn the device off. 2. Remove the device from the electric or magnetic field. 3. Turn the device on again. ENWW The device control panel display has black lines or dots, or becomes blank 91