Apple IIGS: Resetting The Control Panel And Logic Board Problems

Article Change History
----------------------
10/27/92 - REVISED
* To clarify the differences between the ROM 01 and ROM 03
CPUs.


Some Apple IIGS problems can appear to be caused by a faulty, main logic
board. For example, if a user was to set both the foreground and text colours
to black, no video would be apparant. Here's how to reset the video standards
to verify the problem lies in software:

For a ROM 01 GS:

Power down for 10 seconds. Power up and hold control-open apple-esc for a few
seconds and a menu with three choices will appear on the screen. Press the
down arrow key once, then return (accesses the control panel). Next, press the
down arrow key again and hit return (selects the "Display" control panel).
Finally, hit the up arrow key and press the right arrow. This will reset the
display standards.

For a ROM 03 GS:

Power down for 10 seconds. Power up and hold control-open apple-esc for a few
seconds, and a menu with three choices will appear on the screen. Press the
Return key (accesses the control panel). Next, press the down arrow key and
hit return (selects the "Display" control panel). Finally, hit the up arrow
key and press the right arrow. This resets a ROM 03 GS' display standards.

If, after resetting the Control Panel as indicated, the symptoms still
occur, contact your Apple reseller who can refer to the Apple IIGS Technical
Procedures for further troubleshooting information.


Published Date: Feb 18, 2012