VGM-1731  (259-4092)          Troubleshooting          Faxback Doc. # 6099

Before calling an authorized service center, please check this
troubleshooting chart.  Many of the problems that can occur are easily
corrected without the need of a technician.

┌───────────────────────┬────────────────────────────┬────────────────────┐
│Problem                │ Item to Check              │ Location           │
├───────────────────────┼────────────────────────────┼────────────────────┤
│No Display             │ Power switch               │ Front              │
│                       │ (LED should be on)         │                    │
│                       │ Power cord plugged in      │ Rear               │
│                       │ Signal cable connected     │ Rear               │
│                       │ Signal source turned on    │ Your computer      │
│                       │ Signal cable pin assignment│ Rear/Your Computer │
├───────────────────────┼────────────────────────────┼────────────────────┤
│Display Colors         │ Video input level switch   │ Rear               │
│Smeared                │ Termination switch         │ Rear               │
├───────────────────────┼────────────────────────────┼────────────────────┤
│Display Rolls or Tears │ Signal cable pin assignment│ Rear/Your Computer │
│                       │ Scan frequency of video    │                    │
│                       │ board                      │ Your Computer      │
├───────────────────────┼────────────────────────────┼────────────────────┤
│Display is to Dark     │ Contrast and brightness    │                    │
│or too Bright          │ settings                   │ Front              │
│                       │ Termination switch         │ Rear               │
│                       │ Video input level switch   │ Rear               │
├───────────────────────┼────────────────────────────┼────────────────────┤
│Colors Not Uniform     │ Degauss with switch        │ Front              │
│(dark or shadow area)  │                            │                    │
├───────────────────────┼────────────────────────────┼────────────────────┤
│D-Sub/BNC LED Blinking │ Signal cables connected    │ Rear/Your Computer │
│                       │ No signal present          │ Your computer      │
├───────────────────────┼────────────────────────────┼────────────────────┤
│Display to Large or    │ Size controls              │ Front              │
│Small                  │                            │                    │
└───────────────────────┴────────────────────────────┴────────────────────┘

(rjs/BKL-01/16/96)