NEC PowerMate CT manual Diagnostics, Problem

parameters.

2. Replace the CMOS battery (see Section 3) if the date and time must be set each time the system is powered on.

3. Reseat RIMM(s), continuity module, and option boards in their connectors. Inspect system board for foreign objects such as paper clips.

4. Remove option boards and reboot.

5. Replace system board.

1. Press F2 to run Setup and correct the

1. Perform steps 1 through 4 listed in this table under No Power.

1. Check that the power cord is plugged into the power socket on the computer.

Check that the other end of the cord is plugged into a live, properly grounded AC power outlet.

2. Check cable connections between the power supply and system board and between the system board and power switch.

3. Systematically eliminate possible shorted PCBs by removing cables and expansion boards.

4. Check +5 and +12 power supply voltages. Measure voltages with system board installed.

5. Replace the power switch assembly.

6. Replace the power supply.

7. Replace the system board.

Solution

One beep indicates that the system has completed its POST test. If intermittent beeping occurs, power off the system and try again. If the beeping persists, see the following table. The table summarizes problems that may develop during system operation and lists (in sequential order) suggested corrective actions.

Problems and Solutions

“Invalid Configuration” message displayed.

Front panel lamps out, 2. Check power supply voltages. Voltages diskette and/or hard drives do should be measured with a load on them (system

not spin, monitor blank, board plugged in).

interface ports not working,

and keyboard lamp out and/or 3. Replace the power supply. cannot input from keyboard.

Intermittent beeping at power- 1. Check system configuration (see

on. Computer beeps more Section 2). than once and is unable to

complete boot-up.2. Check all jumper settings and verify that drives are enabled (see Section 2).

Any of the following conditions could occur:

Power lamp on computer front panel does not light.

Symptom

Diagnostics

Problem

No power

Power supply malfunction

Operating system does not boot

7-6 Troubleshooting