Why are there translucent scrolling horizontal bars on the screen?
These bars are commonly known as “hum bars.” One cause is that the source and monitor may not share the same electrical ground – instead, they are plugged into separate electric lines grounded on different circuits, or the cable wire itself is not grounded to the same conductor as the unit’s ground. Sometimes battery-powered images sources (camcorders, laptop computers), which share no common electrical ground with the display, introduce the hum bars. Try using the source device’s A/C adapter instead. Another cause is signal wires running next to A/C current wires. Take care to separate these two kinds of wires. If they must come close to each other, arrange the wires so the two kinds cross at right angles and then continue carrying signals or current. You may need to contact your installer or qualified electrician to fix this problem. A third cause of hum bars is a strong motor or other interference-generating power-hungry device sharing the same electric line as the plasma set or its
