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ServSwitch Wizard VGA/USB
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Appendix A. Troubleshooting
A.1 Status indicators
The green indicators built into the link connectors on each module provide useful feedback regarding the connection and power
status:
status:
During startup (of the local module)
• One very short green flash: no valid DDC information available from a locally connected video monitor, no changes made to
stored DDC information.
• Single green flash: DDC information being read from a locally connected video monitor, but no changes made to stored DDC
information.
• Rapid green flash for 2 to 3 seconds, followed by single flash: New DDC information being read and stored from a locally con-
nected video monitor.
• Two green flashes - Checksum error prior to copying - no information will be programmed.
• Three green flashes - Too much data to fit into the module - the module can hold a maximum of two pages of DDC informa-
tion.
• Rapid green flashing followed by four flashes - data was lost during copying - the default data was substituted. Repeat the
power on process.
• Rapid green flashing followed by five flashes - Checksum error during copying - the default data was substituted. Repeat the
power on process.
During operation (either module)
• Continual yellow: Valid CATx link to other module sensed (on dual-variants, only the indicator of the
lower link connector is
used for this purpose).
• Continual green: Correct power input sensed.
Important: The ServSwitch Wizard VGA-USB can be used with other hubs in the system, but please note that due to power con-
straints, the local unit should not be connected to the downstream port of a bus-powered USB hub. Additionally, dual-variant
local units must always be powered using their supplied power adapter. Please see section 3.2.1.5 Local module power for details.
straints, the local unit should not be connected to the downstream port of a bus-powered USB hub. Additionally, dual-variant
local units must always be powered using their supplied power adapter. Please see section 3.2.1.5 Local module power for details.