IBM 655743N Service Manual - Page 13

1-8 Additional Information Warning Messages If there is something wrong with the input signal, one of the following messages appears. INFORMATION OUT OF SCAN RANGE INPUT : 1 1 The input signal condition "OUT OF SCAN RANGE" indicates that the input signal is not supported by the monitor's specifications. "NO INPUT SIGNAL" indicates that no signal is input, or the input signal from the selected input connector is not received. 2 The selected input connector Indicates which input connector is receiving the wrong signal. If there is something wrong with the signal from both input connectors, "1" (HD15) and "2" (13W3) are displayed alternately. To solve these problems, see "Troubleshooting" below. Troubleshooting This section may help you isolate the cause of a problem and as a result, eliminate the need to contact technical support. Symptom No picture Check these items If the u indicator is not lit • Check that the power cord is properly connected. • Check that the u (power) switch is in the "on" position. If the "NO INPUT SIGNAL" message appears on the screen, or if the u indicator is either orange or alternating between green and orange • The screen is blank when the monitor is in power saving mode. Try pressing any key on the computer keyboard. • Check that your computer power switch is in the "on" position. • Check that the input select setting is correct. • Check that the video signal cable is properly connected and all plugs are firmly seated in their sockets. • Ensure that no pins are bent or pushed in the HD15 or 13W3 video input connector. • Check that the video board is completely seated in the proper bus slot. If the "OUT OF SCAN RANGE" • Check that the video frequency range is within that specified for the monitor. message appears on the screen (Horizontal: 30 - 94 kHz, Vertical: 50 - 160 Hz) Refer to your computer's instruction manual to adjust the video frequency range. • If you are using a video signal cable adapter, check that it is correct. If no message is displayed and the u indicator is green or flashing orange • See "Self-diagnosis Function" (page 18). Picture is scrambled • Check your graphics board manual for the proper monitor setting. • Check this manual and confirm that the graphics mode and the frequency you are trying to operate at is supported. Even if the frequency is within the proper range, some video boards may have a sync pulse that is too narrow for the monitor to sync correctly. Color is not uniform • Degauss the monitor (page 12). If you place equipment which generates a magnetic field, such as a loudspeaker, near the monitor, or you change the direction of the monitor, color may lose uniformity. The degauss function demagnetizes the metal frame of the CRT to obtain a neutral field for uniform color reproduction. If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result. 16 GettAindgdSittiaorntaeldInformation Symptom Check these items You cannot adjust the monitor • If the control lock function is set to on, set it to off using the OPTION OSD (page 13). with the buttons on the front panel White does not look white • Adjust the color temperature (page 10). Screen image is not centered or • Press the button (page 5). sized properly • Adjust the size or centering (pages 7 - 8). • Some video modes do not fill the screen to the edges. This problem tends to occur with certain video boards. Edges of the image are curved • Adjust the geometry (pages 8 - 9). White lines show red or blue shadows at edges • Adjust the convergence (pages 10 - 11). Picture is fuzzy • Adjust the contrast and brightness (page 6). • Degauss the monitor (page 12). If you place equipment which generates a magnetic field, such as a loudspeaker, near the monitor, or you change the direction of the monitor, color may lose uniformity. The degauss function demagnetizes the metal frame of the CRT to obtain a neutral field for uniform color reproduction. If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result. • If red or blue shadows appear along the edges of images, adjust the convergence (pages 10 - 11). • If the moire is cancelled, the picture may become fuzzy. Decrease the moire cancellation effect (pages 10 - 11). EN Picture bounces or has wavy • Isolate and eliminate any potential sources of electric or magnetic fields. Common causes F oscillations for this symptom are electric fans, fluorescent lighting or laser printers. • If you have another monitor close to this monitor, increase the distance between them to reduce the interference. D • Try plugging the monitor into a different AC outlet, preferably on a different circuit. • Try the monitor on a different computer in a different room. ES Picture is flickering • Set the refresh rate on the computer to obtain the best possible picture by referring to the computer's manual. I Picture appears to be ghosting • Eliminate the use of video cable extensions and/or video switch boxes if this symptom occurs. Excessive cable length or a weak connection can produce this symptom. Wavy or elliptical (moire) pattern is visible • Cancel the moire (pages 10 - 11). The moire may be modified depending on the connected computer. • Due to the relationship between resolution, monitor dot pitch and the pitch of some image patterns, certain screen backgrounds sometimes show moire. Change your desktop pattern. Two fine horizontal lines (wires) are visible • These wires stabilize the vertically striped aperture grille (page 15). This aperture grille allows more light to pass through to the screen giving the Trinitron CRT more color and brightness. Hum is heard right after the power is turned on • When the power is turned on, the auto-degauss cycle is activated. While the auto-degauss cycle is activated (3 seconds), a hum may be heard. The same hum is heard when the monitor is manually degaussed. This is not a malfunction. 17