English Manual
LINDY KVM Extender C5 PRO-300 Installation and Use page 26 7. Troubleshooting
If you experience problems when installing or using the Extender C5 modules please check through this secti on
for a possible solution.
Video image at the REMOTE module is distorted or shadows appear to the right of displayed objects.
Adjustments are required to compensate for the length of the twisted pair cable being used. If v ideo problems
persist:
• Please refer to ‘Image controls - sharpness and brightness’ section in the ‘Special
Configuration’ chapter.
• If the overall video image is ‘fuzzy’ and/ or has coloured shadows you may need to use the optional C5
Series Skew adjustments. This procedure allows you to finely tune the red, green and blue video signal
timings to overcome most colour separation problems. Please refer to the ‘Skew adjustm ent’ section in
the ‘Special Configuration’ chapter.
• If possible try using Cat5/5e UTP cable. There is no particular advantage in using higher specificati on
Category 6 cables. On the contrary it may even result in unacceptable video quality if you use a)
Category 6 and b) shielded cable.
No video image is received at the REMOTE module
• Check that the power/activity indicators are lit on the LOCAL and REMOTE modules - if they are not,
then there is a power problem. The LOCAL module gains its power either from the computer’s keyboard
socket or by using an optional power supply. When keys are pressed or the mouse is moved, check that
the indicators flicker – if they do not then there could be a twisted pair link problem or a problem with
one of the modules.
• Check that the Category 5 (or higher) cable is wired correctly as per the diagram in the section 5.8
‘Skew Compensation’.
• If possible, try using an alternative twisted pair connection between the modules.
• If the sharpness control is set too high, the monitor may not be able to display a picture. Try reinstating
the factory default sharpness settings. Please refer to the ‘Image controls - sharpness and bright ness’
section in the ‘Special Configuration’ chapter.
• Temporarily disconnect the video link to the LOCAL module, connect a monitor directly to the comput er
video port and check for a correct video image output.
The keyboard indicators are flashing between the Caps Lock and the Num Lock/Scroll Lock and the
computer does not respond to any keyboard or mouse inputs.
• The modules are currently locked and require a valid password to be entered. Please refer to the
section ‘Locking and unlocking the system’ for details.
Power is applied via the power supply but REMOTE module operation has stopped.
• Each module has an internal automatic cut-out fuse to protect against power surges. To reset, remov e
power from the module for one second and then reconnect.
The on-screen mouse pointer does not respond to mouse movements
• The mouse connection may have been interrupted. Either, reboot the system and re-power the
REMOTE module power supply, or try using the mouse restoration command. Please refer
to section 5.6 ‘Hot plugging and mouse restoration.’