Replacing Assemblies - HP E8400A C-Size VXI Mainframe User And Service Manual

Table 3-1. Isolating Problems Within the HP E8400A 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

42 Troubleshooting and Repair
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 temperature is high. Mainframe is nearing automatic shutdown.
Check for proper air flow and clearance around the mainframe fan.
Power supply fan or backplane 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 3-2. Contact the HP
TMO Business Center at 1-800-829-4444 to obtain replacement assemblies.
Table 3-2. HP E8400A Replacement Assemblies
Assembly
Basic Monitor
Power Supply
Power Supply fan
Impeller (backplane fan)
Action
Part Number
E8400-66502
0950-3305
E8400-68500
E8400-68501
Chapter 3