Black Box ServSwitch Wizard VGA/USB Manual De Usuario

Chapter 3: Installation

724-746-5500   |   blackbox.com 

Page 23

3.3.1 DDC indications

When power is first applied to the local module (either from the computer’s USB port or an optional power 
adapter) it will search for valid DDC data on its video out connector. During this process, the green indicator 
(built into the link connector) will flash to indicate its progress:

•  If no valid DDC information is located, the green indicator will give one very short flash, representing an

attempt to read data. No changes will be made to the information already stored within the local module.

•  If the DDC information is the same as that already stored, no change will be made and the green indicator

will give one single flash as the information is checked and normal operation resumes.

•  If different DDC information is located, the green indicator will flash rapidly for 2 to 3 seconds while the new information is

stored. A single flash will then be given as the information is checked and normal operation resumes.   

The local module’s green indicator also provides fault indications to assist with troubleshooting:

•  Two flashes - Checksum error prior to copying - no information will be programmed.

•  Three flashes - Too much data to fit into the module - the module can hold a maximum of two pages of DDC information.

•  Rapid flashing followed by four flashes - data was lost during copying - the default data was substituted. Repeat the power on

process.

•  Rapid flashing followed by five flashes - Checksum error during copying - the default data was substituted. Repeat the power

on process.