Sun Microsystems 60 service manual Power-On Failure, Action

4.1Power-On Failure

This section provides examples of power-on failure symptoms and suggested actions.

Symptom

The system unit does not power up when the keyboard power switch is pressed.

Action

Check the keyboard connection. Ensure that the keyboard is properly connected to the system unit. Check the AC power cord. Ensure that the AC power cord is properly connected to the system unit and to the wall receptacle. Verify that the wall receptacle is supplying AC power to the system unit.

Press the power switch. If the system unit powers on, the keyboard may be defective or the system unit is unable to accept the keyboard power-on signal. Power off the system unit and press the keyboard power-on switch again. If the system unit powers on, no further action is required. If the system unit does not power on, the CPU module may not be properly seated. Inspect the CPU module for proper seating. If the system unit powers on, no further action is required. If the system unit does not power on, the keyboard may be defective.Connect a spare Sun Type-5 keyboard to the system unit and press the power-on key.

If the wall receptacle AC power has been verified, the CPU module is properly seated, and a spare Sun Type-5 keyboard has been connected to the system unit and the power-on key has been pressed but the system unit does not power up, the system unit power supply may be defective. See Section 4.4, “Power Supply Test” on page 4-5.

Symptom

The system unit attempts to power up but does not boot or initialize the monitor.

4-2Sun Ultra 60 Service Manual • August 2001