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Clear the UEFI
You must clear the system configuration values that are stored in the UEFI if
the following conditions are present:
• The system configuration has been corrupted
• An incorrect setting has caused error messages to be unreadable
• You cannot access the UEFI set-up utility to load the system defaults
Follow these steps to clear the UEFI.
1. Back up all system data and then shut down the computer.
2. Follow the steps for
3. Remove the cover as detailed in
IMPORTANT
4. Locate the Clear UEFI (CMOS1)
jumper on the motherboard.
See
Figure 5 on page 15
5. Remove the jumper block from its
default position (over pins 1 and 2).
6. Place the jumper block over pins 2 and 3
for 10 seconds.
7. Return the jumper block to its default
position.
IMPORTANT
8. Reinstall the cover as detailed in
9. Follow the steps for
IMPORTANT
10. During POST, press F2 on an attached keyboard to access the UEFI set-
up utility and reconfigure settings.
Rockwell Automation Publication 6177R-UM002F-EN-P - May 2018
Pre-configuration on page
Remove the Cover on page
Use an anti-static wriststrap that is connected to a grounded
surface.
for its location.
The jumper block must be returned to its default position over pins
1 and 2. The computer does not start if you leave the jumper block
over pins 2 and 3.
Reinstall the Cover on page
Post-configuration on page
When you clear the UEFI, all UEFI settings return to their defaults.
Settings other than default must be reconfigured after the UEFI is
cleared.
Troubleshoot the System
Chapter 6
34.
36.
Jumper
Block
Pins
Default
Clear UEFI
1 2 3
Position
Position
37.
35.
85
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