HP dx6120 Troubleshooting Guide - Page 38
inside a CRT monitor., Clicking noise coming
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Troubleshooting Without Diagnostics Solving Display Problems (Continued) Problem Cause The picture is broken up, rolls, jitters, or flashes. The monitor connections may be incomplete or the monitor may be incorrectly adjusted. Monitor needs to be degaussed. Vibrating or rattling noise coming from inside a CRT monitor when powered on. Clicking noise coming from inside a CRT monitor. Monitor degaussing coil has been activated. Electronic relays have been activated inside the monitor. High pitched noise coming from inside a flat panel monitor. Brightness and/or contrast settings are too high. Solution 1. Be sure the monitor cable is securely connected to the computer. 2. In a two-monitor system or if another monitor is in close proximity, be sure the monitors are not interfering with each other's electromagnetic field by moving them apart. 3. Fluorescent lights or fans may be too close to the monitor. Degauss the monitor. Refer to the documentation that came with the monitor for instructions. None. It is normal for the degaussing coil to be activated when the monitor is powered on. None. It is normal for some monitors to make a clicking noise when turned on and off, when going in and out of standby mode, and when changing resolutions. Lower brightness and/or contrast settings. 2-22 www.hp.com Troubleshooting Guide