XE–900 Single Board Computer Reference manual

Chapter 16: Troubleshooting

If your system is not working properly, check the following items.

No system LED activity

If there is no LED activity, check the following:

Make sure all PC/104 or PC/104-Plus expansion cards are removed from the

XE–900 SBC. This ensures that other cards are not interacting with the XE–

900 SBC.

Turn the “S” switch Off.

Check all power connections to the XE–900 SBC card.

Measure the supply voltage at the J8 power connector and verify that the voltage at the XE–900 SBC card is +5V (+/–0.25V).

Make sure your power module provides +5V (+/–0.25V) and at least 10A of current (to meet inrush requirement).

No CRT or flat panel video

If the LEDs appear to be functioning properly, but there is no video activity, check the following:

Make sure all PC/104 or PC/104-Plus expansion cards are removed from the

XE–900 SBC. This ensures that other cards are not interacting with the XE–

900 SBC.

Turn the “S” switch Off.

If using a CRT monitor, check the cable and connections going from the J1 connector to the monitor.

If using a flat panel display, check the following:

Check the power and cables going to the flat panel display.

Make sure that the power module has enough current capacity to power both the XE–900 SBC card and the flat panel.

If an analog monitor is not present or is not displaying the video data correctly, the system can be booted via the serial console by doing the following:

1. Turn the “S” switch Off and the “V” switch On.

2. Connect the COM port of a host computer running HyperTerminal or some other terminal software to COM1 on the XE–900 SBC using a serial console

(see page 47.) The serial port settings on the host computer should be

115.2K baud, 8, N, and none.

3. Power up the XE–900 SBC; it will boot using the serial console interface.

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