Compaq AP200 Reference Guide - Page 111

diskette. See the Failsafe Boot, The RGB Red, Green, Blue

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6-9 Solving Display Problems Continued Problem Cause Solution Blank screen (continued) The RGB (Red, Green, Blue) Set the monitor's RGB input switch input switch on the back of the to 75 ohms and, if there is a sync monitor is incorrectly set. switch, set it to External. System ROM is bad; system is running in Failsafe Boot Block mode (indicated by one long beep and three short beeps). Reflash the ROM using a ROMPaq diskette. See the "Failsafe Boot Block ROM" section of Chapter 2 for more information. You are using a fixed-sync Be sure that the monitor can accept monitor and it won't sync at the the same sweep rate as the resolution chosen. resolution chosen. Monitor does not function Monitor without energy saver Disable monitor energy saver properly when used with capabilities is being used with feature. energy saver features energy saver features enabled. Video colors are wrong This indicates that either the 1. If you are using BNC cables, cabling or monitor impedance be sure that the Red, Green, is incorrect. and Blue BNC cables are connected to the corresponding monitor connectors. 2. Be sure your monitor's RGB inputs are set to 75 ohms. Dim characters The brightness and contrast Adjust the monitor brightness and controls are not set properly. contrast controls. Cables are not properly connected. Check that the video cable is securely connected to the video card and the monitor. Continued Compaq Professional Workstation AP200 Reference Guide

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6-9
Compaq Professional Workstation AP200 Reference Guide
Solving Display Problems
Continued
Problem
Cause
Solution
Blank screen (
continued
)
The RGB (Red, Green, Blue)
input switch on the back of the
monitor is incorrectly set.
Set the monitor’s RGB input switch
to 75 ohms and, if there is a sync
switch, set it to External.
System ROM is bad; system is
running in Failsafe Boot Block
mode (indicated by one long
beep and three short beeps).
Reflash the ROM using a ROMPaq
diskette. See the “Failsafe Boot
Block ROM” section of Chapter 2 for
more information.
You are using a fixed-sync
monitor and it won't sync at the
resolution chosen.
Be sure that the monitor can accept
the same sweep rate as the
resolution chosen.
Monitor does not function
properly when used with
energy saver features
Monitor without energy saver
capabilities is being used with
energy saver features enabled.
Disable monitor energy saver
feature.
Video colors are wrong
This indicates that either the
cabling or monitor impedance
is incorrect.
1.
If you are using BNC cables,
be sure that the Red, Green,
and Blue BNC cables are
connected to the
corresponding monitor
connectors.
2.
Be sure your monitor’s RGB
inputs are set to 75 ohms.
Dim characters
The brightness and contrast
controls are not set properly.
Adjust the monitor brightness and
contrast controls.
Cables are not properly
connected.
Check that the video cable is
securely connected to the video
card and the monitor.
Continued