Figure 33. cRIO-904x Desktop Mounting Side Dimensions
132.8 mm (5.23 in.)
127.2 mm
(5.01 in.)
BIOS Configuration
Resetting the System CMOS and BIOS Settings
The cRIO-904x BIOS configuration information is stored in a nonvolatile memory location
that does not require a battery to preserve the settings. Additionally, the BIOS optimizes boot
time by saving specific system information to memory backed up by a battery (CMOS).
Complete the following steps to reset the CMOS and reset the BIOS settings to factory default
values.
1. Disconnect power from the cRIO-904x.
2. Press the CMOS reset button and hold it for 1 second.
3. Reconnect power to the cRIO-904x.
The BIOS Reset Detected warning message appears onscreen.
Note If the CMOS battery is dead, the CMOS reset button will not work.
Power-On Self Test Warning Messages
The cRIO-904x POST displays warning messages for specific issues onscreen. You can use
MAX to enable Console Out to send these warning messages through the RS-232 serial port.
The POST can display the following warning messages:
• BIOS Reset Detected—This warning is displayed when the CMOS Reset button has been
pushed. This warning indicates that the BIOS settings have the default values.
• CMOS Battery Is Dead—This warning is displayed when the CMOS battery is dead and
must be replaced. The BIOS settings are preserved even when the CMOS battery is dead,
but the system will boot very slowly because the BIOS cannot optimize boot time by
saving specific system information to CMOS.
40 | ni.com | cRIO-904x User Manual
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