PRG Mbox Designer User Manual v3.6.1 - Manual (Page 64)

56 MBOX ® MEDIA SERVER USER MANUAL
Step 8. After four seconds, the LED will stop flashing and will remain on for about two seconds. During this time the
EDID data is being captured.
Step 9. Once the external capture is complete, the LED will again flash, but more slowly than before. At this point,
release the switch.
Step 10. At Mac Displays Preference window, click Detect Displays button. The computer will re-sync the outputs
and the new EDID will be applied. (You can connect your display devices at this point.)
Step 11. You should have a viewable resolution on the output that you were reconfiguring. You may still need to
change this resolution (using the Displays Preference window) to a specific desired resolution.
Step 12. Perform steps 1 - 9 on the other output section of the I/O module.
CAUTION! Because the EDID data in the Dual I/O module can be reprogrammed, the computer can output
resolutions that your display devices may not be able to support. If you connect a display device and cannot get a
picture, even with the MBOX
Designer software not running (you may see a message like "Unsupported resolution" on
the display), then you should revert the EDID data to the standard 60Hz set. Note also that if the EDID has been set to
a mode where you cannot view the desktop, then you will be unable to view the Display Preferences window. Refer to
the steps below.
To return the desktop view:
If the EDID in the I/O module has a resolution and frequency that the connected display device does not support, it
can result in no picture on the desktop. Without a picture, you can switch EDID sets using the switches, but you can't
press the "Detect Display" button because it is not visible on the screen.
In order to revert to a standard EDID set so the desktop can be seen, it will be necessary to view the Mac Displays
Preference window. If you cannot view the desktop (and therefore, this window) due to previous EDID changes, then
do the following:
Step 1. Connect a DVI monitor to Preview 1, and disconnect everything else.
Step 2. Capture EDID from that monitor. (Refer to page 55 .)
Step 3. Unplug and replug DVI from rear of Mac, or shutdown and reboot the computer.
Step 4. Provided MBOX Designer is not running, you should now be able to see the Mac desktop on the monitor.
Step 5. Open Mac Displays Preferences window. Press Gather Windows button to get both of the setup windows
onto that monitor.
Step 6. Either set the other output to a working resolution/frequency (for the display devices you have) or again
change EDID to something compatible.
Step 7. Press Detect Displays. The other output should now work with your display device.
Step 8. Connect monitor to the other output, and reconfigure the first one as desired.
To revert to a standard EDID set:
If the custom EDID data in the I/O module is no longer needed, simply return the configuration to one of the standard
EDID sets as follows:
Step 1. Quit MBOX Designer.
Step 2. Connect a monitor to both output sections (Figure 3-3).
Step 3. Open Mac Displays Preference window (Figure 3-2).
Step 4. Set Stage Blackout and Preview Dim switches to new positions as required. Refer to chart on page 55 .