Apple Multiple Scan 20 Display Especificaciones Pagina 24

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Troubleshooting Symptom Charts/Raster - 12
Symptom Charts
Raster
No raster; power
indicator light on
1 Ensure monitor’s video cable is properly connected to
computer or video card in the computer.
2 Replace main deflection board.
Raster edges have
color blotches when
displaying an all-
white screen
1 Degauss monitor with an external degaussing coil.
2 Move monitor to different location and repeat degaussing
procedure.
Note:
This symptom is caused by strong magnetic fields in the
environment. Exchanging boards will not cure the symptom. Refer
to “First Checklist” in this chapter.
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