Caple CM109 User Manual download pdf (Page 81)

BDM-610000082 Rev A Chapter 4: Using the cpuModule 73

System Recovery

Reset Button Recovery

The CMX34GS provides several methods for recovering from an incorrectly configured system. In order to enter

the recovery mode, follow the steps below:

1. Remove power from the system, including standby power.

2. Press and hold the reset button attached to the Utility Port 2.0 connector.

3. Apply power to the system while continuing to hold the reset button.

4. Wait the amount of time shown in Table 52 for the desired recovery mode.

5. Release the reset button, allowing the system to boot.

Load Default BIOS Settings

Loading BIOS defaults allows recovery from an incorrectly configured display device, incorrect boot options, and

many other incorrect settings. It is also a good starting point when making BIOS changes. After restoring defaults,

the BIOS settings should be reviewed and modified as needed.

The default BIOS can be restored by the “Load RTD Defaults” option in the BIOS.

Serial Power-On-Self-Test (POST) Code Output

The POST Codes represent a series of events that take place in a system during the Power On Self Test. If the POST

fails, the system will not boot as expected. Knowing which POST code the failure occurred may help system

debug.

This recovery mode configures serial port connector CN7 as single RS-232, and sends the POST codes on the

transmit pin. The port settings are 115kbps, 8 bits, no parity, one stop bit. When using this recovery mode, the

POST codes can be logged on another computer running terminal software. Contact RTD technical support for

more details.

Table 52 Reset Button Recovery Modes

Hold Time

1. To assist with timing while the reset button is pushed, the LED will blink OFF at 5 second

intervals.

Mode

0-4 seconds No recovery mode. System will stay in reset while button is pressed.

4-8 seconds Reserved

8-12 seconds Serial POST Code Output

Note POST Codes over the serial port (CN7) may also be enabled by installing JP5 and JP6 prior to

power cycling the cpuModule. For more information, see

Jumper Settings and Locations

on page 76

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Caple CM109 User Manual Page 81