Dell 4100/200, 4100/180 Troubleshooting a Cooling Fan, Troubleshooting Power Cable Connections

4.Slide the power supply out of the chassis (see Fig- ure 7-7).

Figure 7-7. Removing the Power Supply

5.Check that the locking switch on the new power supply is set to the “off” position, then slide the power supply into the chassis.

6.Turn the locking knob clockwise until the replace- ment power supply is secured in the chassis.

7.Connect the AC power cable to the power supply and to the power outlet.

Make sure that the AC power cable passes through the plastic strain-relief clip.

8.Turn the locking switch on the power supply to the “on” position, marked by an “I.”

If an optional power-supply paralleling board is installed, the green online indicator on the power supply should light up.

Troubleshooting Power Cable

Connections

1.Check the AC power outlet and power cable (see “Checking Connections and Switches” in Chap- ter 2.

2.Turn off the system, including any attached peripherals, and disconnect all the AC power cables from their power sources.

3.Remove the computer covers.

See “Removing the Computer Covers” found earlier in this chapter.

4.Check the cable connections listed in Table 7-1.

.

Table 7-1. Power Cable Connectors on the Optional Power-Supply Paralleling Board

Connector	Cable Connection
PWR1	To POWER1 connector on
	system board
PWR2	To POWER2 connector on
	system board
PWR3	To POWER3 connector on
	system board
PWRFD	To diskette drives and other
	devices in external drive
	bays
PWRSCSI	To POWER connector on
	SCSI backplane

Troubleshooting a Cooling Fan

Three cooling fans are installed in the Dell PowerEdge 4100 system. Two fans are used to cool the computer; the third cooling fan does not operate unless one of the other two fans fails. If you observe that only one of the three redundant cooling fans is operating, or the Dell HIP server-management application program issues a fan- related error message, replace the fan as described in the following subsection.

Checking Inside the Computer 7-9