Replacing Assemblies - HP E8402A User And Service Manual

Table 5-1. Isolating Problems Within the HP E840xA Mainframe.
Symptom
Flashing Voltages Indicator
Flashing Temperature Indicator
Flashing Fans Indicator
Monitor indicators are off and
fans do not operate when On
button is pressed.
No monitor indicators when
mainframe is turned on.
The SYSFAIL indicator will come on and remain on when a VXI module installed in the mainframe fails.

Replacing Assemblies

206 Servicing Your Mainframe
One or more backplane voltages may be out of specification. Check
diagnostic connector pins 1, 2, 3, 4, 14,15,16. Check for a loose cable
between the basic monitor assembly and the backplane. Replace power
supply if any voltage remains out of specification.
Power supply or slot temperature is high. Mainframe is nearing automatic
shutdown. Check for proper airflow and clearance around the mainframe.
Power supply fan or mainframe impeller has failed. Visually inspect to
determine which fan is not rotating. Turn off mainframe to avoid possible
overheating. Replace the affected fan.
Check for a loose cable between the basic monitor assembly and the
backplane. Replace the basic monitor board.
Check diagnostic connector pins 1, 2, 3, 4, 13, 14, 15, 16 to determine if
backplane voltages are within specification and power supply and backplane
impeller are functioning. Replace the basic monitor
This section contains instructions for replacing the basic monitor, power
supply, power supply fan, and impeller.These assemblies are available from
Hewlett-Packard under the part numbers shown in Table 5-2. Contact the HP
TMO Business Center at 1-800-829-4444 to obtain replacement assemblies.
Table 5-2. HP E8400A Replacement Assemblies
Assembly
Enhanced Monitor
Display PC Board
Temperature Sensor PC
Boards (replace all
three)
Enhanced Monitor
Controller PC Board
Enhanced Monitor
Display Lamp
Power Supply
Impeller (backplane fan)
Action
HP E8402A
Part Number
E8402-66502
E8401-66504
(includes all three PC
boards)
E8401-66503
E8401-69204
500 W Power Supply
Exchange Assembly
E8400-68501
HP E8404A
Part Number
E8402-66502
E8401-66504
(includes all three PC
boards
E8401-66503
E8403-69204
1000W Power Supply
Exchange Assembly
E8400-68501
Chapter 5