CRYSTALVIEW INSTALLATION AND OPERATIONS MANUAL
23
Picture on monitor is black and white, not color.
n
The video cable was not attached to the PC when it was
booted. Reboot the PC.
A constant vertical wobble appears down the screen.
n
The CAT-5 cable connecting the Local and Remote Units could
be located too close to a strong power source. Reroute the
cabling if possible.
n
If interference is from strong signals from a nearby broadcast
transmitter, a beat pattern will appear. Change the vertical
refresh rate on the monitor slightly, such as from 60Hz to 70Hz.
Microsoft Windows or NT will only boot into low-resolution
graphics mode.
n
If your graphics card supports VESA DDC (Display Data
Channel), configure the graphics driver by explicitly indicating
which make and model of monitor you have rather than by using
DDC.
No sound at the Remote Units speakers or headphones.
n
Audio cable loose or defective.
n
Audio cable in the wrong connector.
n
Sound card “Line Out” muted.
No sound at the CPUs speakers when using a Microphone on
the Remote Unit.
n
Microphone cable in wrong connector.
n
Sound card “MIC” input muted.
n
Microphone signal not amplified; increase sound card
amplification by +20db. Add “MIC” jumper on the Remote Units
daughter board to increase signal. Do not add this jumper if the
microphone is already a powered microphone.