Compaq 400 486 DX2/40 MHZ 250 MB 4 MB 9.5 Personal Computer User Manual


 
Distorted or garbled The ANSI.SYS driver Add the ANSI.SYS driver to
characters on the is not in the the CONFIG.SYS file. Add
display are mixed CONFIG.SYS file or the following line:
with text. the path is DEVICE=C:\ANSI.SYS
incorrect.
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Computer display Using 800 x 600 or Restart the computer. If
flashes or has higher resolution on simultaneous display is
garbled characters external monitor and desired, use 640 x 480
when computer is have toggled back to resolution. **
connected to external internal display,
monitor. which only supports
640 x 480 resolution.
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** When using an external monitor and simultaneously displaying an image on
the internal display, the image on the external monitor may not fill the
screen.
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Problem Probable Cause Solution(s)
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Computer display and External monitor was Turn the computer off and
external monitor do connected after the connect the external
not display computer was turned monitor on, then turn on
information on. the computer.
simultaneously.
Press the Fn + F4 keys to
"toggle" through the three
display possibilities.
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The light tubes on External monitor was If an external monitor is
the edge of the connected when the detected during POST, only
display panel do not computer was turned the external monitor will
light up at all and on. turn on. Press the Fn + F4
Power-On Self-Test keys to activate the
(POST) completes when Improper backlight or computer display.
the unit is powered display cable 1. Reseat the display cable
up. ** connections. to the system board.
2. Reseat the display cable
to the inverter board.
3. Reseat the backlight
cable to the inverter
board.
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Defective inverter Replace the inverter board.
board.
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Defective display Replace the display cable.
cable.
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Defective display Replace the display panel.
panel.
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Defective system Replace the system board.
board.
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The light tubes on Defective system Replace the system board.
the edge of the board.
display panel do not