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DDC™ Diagnostic Utility
For IBM computers and compatibles
The ViewSonic EA771/EA771B uses DDC (Display Data Channel) protocol
to communicate with your computer's video card. The software diskette or
CD-ROM included in the ViewSonic EA771/EA771B 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 appears:
1. If the utility detects that DDC is functioning, the following appears:
View Sonic/Optiquest Plug & Play monitor: EA771/EA771B
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:
View Sonic/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.
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Operation
ViewSonic EA771/EA771B
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