TROUBLESHOOTING
30 The PC won’t boot into the correct graphics mode
The extender includes DDC emulation for all standard resolutions and there should
not normally be any issues. However, you must be using DDC capable CPU cables
on each hub port.
For non-standard resolutions, you will need to explicitly set the resolution in your
operating system configuration ignoring the DDC data read from the Local Unit.
Contact Technical Support if you have problems selecting your required graphics
mode.
The image is not stable and is blanking regularly.
Re-power the Remote Unit.
Can the extender be used with RGB video?
Yes.
4.2 Audio The audio is very quiet.
The audio I/O is line-level and requires amplified speakers and connection to
devices providing line-level I/O.
The audio is loud but distorted.
Check that the audio input is not greater than line level (4V peak-to-peak). KVM
Extenders accepts line-level audio input only.
The microphone output is barely audible.
See Appendix B: Audio/Serial Ports, page 38.
4.3 Serial My serial device does not function.
The extender supports serial devices at data rates not exceeding 19.2K Baud
(although 38.4K operation might be possible with certain equipment).
Check the type of flow control used by the device and CPU. The extender supports
RTS, CTS, DTR, and DSR. Some systems may require a wiring adapter to transfer
RI and DCD.
Attach the device directly to the serial port on the PC and test whether the problem
is a PC or extender problem.
Some serial devices cannot be hot-plugged. Try connecting the device to a powered
Remote Unit prior to booting the system.