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Technical Assistance
Q: Why is the display shifted or changed sizes when I switch display modes?
Explain and Suggestion:
Some monitors lack auto-sizing features or just do not synchronize properly to the video
board output. In some cases, horizontal and vertical display adjustments may be
necessary. Use the monitor control panel functions to adjust screen.
In other cases, mode type and refresh rate adjustments may be necessary. Use the
utility program, which provided by video card manufacturer or production developer. To
center the display with normal type (mode 3), and to reduce (decrease) the refresh rate
with the monitor's specification.
Q: What kind monitors can display 800x600 modes or higher resolution mode?
Explain and Suggestion:
To display 800x600 resolution at 60Hz refresh rate, the monitor must be capable of
synchronizing a 31.5KHz horizontal scan rate (e.g., NEC 2A, 3D). At 72Hz refresh rate,
the monitor must be capable of synchronizing a 48.0KHz scan rate (e.g., Sony HG
1304, NEC 4D, 5D, Seiko 1450).
To display 1024x768 interlaced mode; the monitor must be capable of synchronizing a
35.5KHz horizontal scan rate (e.g., NEC 3D, Seiko 1430 or 1440). To display 1024x768
non-interlaced mode at 60Hz, the monitor must be capable of synchronizing a 48.7KHz
scan rate (e.g., Sony HG 1304, NEC 4D, 5D, Seiko 1450).
To display 1024x768 non-interlaced mode at 70Hz, the monitor must be capable of
synchronizing a 56.4KHz scan rate (e.g., NEC 4D).
Q: System hangs-up after installing video driver.
Explain and Suggestion:
Today, most video drivers are developed for 32-bit processing and may require a
channel to Code/Decode. Conflict between device drivers and TSR (terminate-and-
stay-resident) programs will inverted the display, and are particularly effectual at
crashing computer. The most effective way to check for conflicts is to replace with the
original video driver, or delete and re-install the current video driver to the system.
Accomplishing IRQs (Interrupt Request Query) settings or troubleshooting the conflicts
on hardware source may necessary. Most AGP video cards designed for Plug-n-Play,
that means video card IRQ's setup which controls by main board’s (motherboard)
circuitry and BIOS. Physically pulling out other devices from system, and re-starts the
computer. Confirm and modify your IRQ addresses with qualified computer technician.