Epson Equity 386/33 PLUS Product Support Bulletin page 5

4. Possible display symptoms and causes.
System CMOS and video jumpers must be set appropriately to successfully
install any video adapter. The system may not sync properly after an adapter
and display are installed. A common symptom is that the system appears to
be dead (no boot activity or keyboard response).
Hardware CMOS settings are incorporated into the BIOS ROM. Color VGA is
the hardware default setting for video support. If a display adapter and monitor
are installed and the system booted, the monitor may not synchronize properly
because VGA BIOS calls are still being refreshed. Two possible indications
can occur at this point:
a) constant diagonal raster [loss of Horizontal Sync]
b) random pixel characters on display, no raster update visible.
The system is operational even though the display may be garbled or not
apparent. The system has encountered a conflict between CMOS settings and
the hardware that is sensed by the system. Hitting the 'F1' key will allow the
boot process to continue and the system will load the operating system even
though no video display may be present.
5. Examining CMOS for Third Party video support (video card on bus);
A.) Attach a Color VGA monitor to the external VGA port on the rear of the
system.
B.) Boot the system. During boot process hit the delete, <Del>, key to enter
the CMOS setup program.
C.) A 'Start operating system/Run Setup' screen will be displayed. Hit the
down-arrow key to highlight 'Run SETUP'.
D.) Hit the 'enter' key to start 'setup'.
E.) Hit the down-arrow key to the 'Primary display' option. 'VGA or EGA'
setting is currently highlighted.
F.) Verify that 'VGA or EGA' is set and DO NOT alter the setting.
G.) Hit the Escape key, <Esc>, and a message 'Save SETUP configuration
(Y/N)?' is displayed. Enter the letter Y and hit enter to continue.
H.) The system will reboot and go through POST and load DOS.
PSB No: S-0157
Page: 2 of 4