Sun Microsystems Netra CT 410, Service Manual

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Chapter 4 Troubleshooting the System 4-23
4.7.3 General Troubleshooting Requirements
The following devices are required to take some of the recommended actions in this
section:
■
Network interface
■
TTYA and TTYB connection or an ASCII terminal connection to serial port
■
Parallel port interface
■
Loopback connectors
4.7.4 Mechanical Failures
Symptom
Unable to insert the CPU board into the backplane.
Action
1. Verify that no mechanical and physical obstructions exist in the slot where the
CPU board is going to be installed.
2. Make sure no pins on the board connectors or the CompactPCI backplane
connectors are bent or damaged.
3. Verify that the front panel screws are seated and not preventing the board from
seating properly.
4.7.5 Power-On Failures
This section provides examples of power-on failure symptoms and suggests actions.
●
Make sure the CPU board is installed properly.
■
If the CPU board is a host Netra CP2140 or satellite Netra CP2160 and both the
Ready and Alarm LEDs on the CPU board are green, the board is partially
functional and capable of running POST (power on self-test). However, if none of
the LEDs is green, the board is not functional. In this case, contact your Sun
supplier or field service engineer.