Appendix
81
Troubleshooting
General
Problem Solution
Keyboard and/or mouse do
not work after computer
boots up.
For computers with PS/2 connectors, if you are using 2L-
520xP cables, make sure that all the connectors
(keyboard, video, and mouse) are plugged into their ports
on the computer before starting the computer. Plugging
the cables in after the computer has booted will not
resolve the problem.
When I emulate the Sun
keyboard, I can’t go into OK
Mode ([Stop] [A]).
To go into OK Mode, use the following key sequence:
1. Press and release [Ctrl].
2. Press and hold [T].
3. Press and hold [A].
4. Release [T] and [A] together.
There are ghost images on
the external monitor.
The distance between the external console and the
KL1508A / KL1516A is too great. The maximum VGA
cable distance should not exceed 20m and, in some
cases, may need to be shorter. Replace the VGA cable
with one of an appropriately short length.
I can’t set the computers’
screen resolutions higher
than 1280 x 1024.
The maximum screen resolution of the KL1508A /
KL1516A’s integrated LCD monitor is 1280 x 1024. In
order to protect it from being damaged by resolutions that
are beyond its display capability, we recommend that the
screen resolutions of the connected computers be set to
1280 x 1024 or lower.
When I switch to one of the
computers on my
installation, the LCD
monitor screen goes blank.
All I see is a black screen.
The maximum screen resolution of the KL1508A /
KL1516A’s integrated LCD monitor is 1280 x 1024. The
screen resolution of the problem computer is set to
something that is too high for the KL1508A / KL1516A’s
LCD monitor to display.
To resolve the problem, connect an external KVM
console (with a monitor capable of displaying the problem
computer’s screen resolution) to the KL1508A /
KL1516A’s external console ports. Use the external
console to access the problem computer and reduce its
resolution to 1280 x 1024.
