Optiquest Q53 - Manual (Page 19)

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Optiquest Q53 Operation
The Optiquest Q53 uses DDC (Display Data Channel) protocol to
communicate with your computer's video card. The software diskette or CD
ROM included in the Optiquest Q53 package has a utility file called
DDCTEST.EXE. This utility is useful for troubleshooting if DDC-related
problems occur when using Windows
® 3.1 or Windows ® 95.
When you run the DDC Diagnostic Utility, one of two messages will
appear:
1. If the utility detects that DDC is functioning, the following appears:
ViewSonic/Optiquest Plug & Play monitor: Q53 successfully detected.
Hit any key to read and decode the EDID information...(ESC to exit)
If you hit a key, you will see information about the monitor. This information
is a table of EDID codes (Extended Display Identification Data) and an
explanation of the codes. Press ESC to exit then:
a. Check if DDC is enabled in Windows. Refer to the README.TXT file
on the ViewSonic  diskette or CD ROM for instructions on how to
enable DDC in Windows.
b. Install the ViewSonic MONITOR.INF file included on the ViewSonic
diskette or CD ROM. It is titled VSdatecode.inf, with the date code in
year/month/day. Refer to the README.TXT file for installation
instructions.
If Plug & Play still does not work after you have followed the procedure
above, call ViewSonic Customer Support.
2. If the utility detects that DDC is not functioning, the following appears:
ViewSonic/Optiquest Plug & Play monitor was not detected
Exit the utility. Turn the monitor off. Wait ten seconds and turn the monitor
on. Try the DDC Diagnostic Utility again. If you still receive the message that
the monitor was not detected:
a. Check your computer or graphics board manufacturer's user's guide to
see if your graphics system is DDC compatible.
b. Check the video cable connector for bent or broken pins.
c. Refer to the README.TXT file troubleshooting section (included on the
ViewSonic diskette or CD ROM).
If the procedure above does not work, call ViewSonic Customer Support.
DDC TM Diagnostic Utility
For IBM computers and compatibles