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Black Box ACU505A-R2 Manual De Usuario

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ServSwitch Wizard VGA/USB
724-746-5500   |   blackbox.com 
Page 30
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:
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.