HP Xw8400 HP xw8400 Service and Technical Reference Guide - Page 122

Solving diskette problems, Table 5-5

Page 122 highlights

Table 5-4 Power supply problems (continued) Problem Cause Solution Workstation powered off Processor thermal protection 1. Be sure that the workstation air vents are not blocked automatically and the Power LED activated. and the cooling fan is running. flashes red two times, once every second, followed by a two-second A fan might be blocked or not 2. Open the access panel, press the power button, and pause. turning. determine if the processor fan spins. If the processor fan is not spinning, be sure the fan's cable is plugged OR into the system board header. Be sure the fan is The CPU heatsink fan properly seated or installed. assembly is not properly 3. Replace the processor fan. attached to the processor. 4. Reseat the CPU heatsink, and verify that the fan assembly is properly attached. Power LED flashes red, once every Power failure (power supply is 1. two seconds. overloaded). Determine whether a device is causing the problem by removing all attached devices). Power on the system. If the system enters the POST, then power off and replace one device at a time and repeat this procedure until failure occurs. Replace the device causing the failure. Continue adding devices one at a time to ensure all devices are functioning properly. 2. Verify power supply functionality. a. Disconnect AC power. b. Remove all internal power supply cables from the system board. c. Plug in AC power. ● If the power supply fan spins and the BIST LED lights, then the power supply is good. Replace the system board. ● If the power supply fan does not spin or the BIST LED does not light, replace the power supply. Solving diskette problems Table 5-5 Diskette problems Problem Diskette drive light stays on. Drive not found. Cause Solution Diskette is damaged. Right-click Start, click Explore, and select a drive. Select File>Properties>Tools. Under Error-checking, click Check Now. Diskette is incorrectly inserted. Remove diskette and reinsert. Files on diskette are damaged. Check the program diskettes. Drive cable is not properly connected. Reconnect power cable. Be sure that all four pins are connected. Cable is loose. Reseat diskette drive data and power cables. Removable drive is not seated Reseat the drive. properly. 112 Chapter 5 System diagnostics and troubleshooting ENWW

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Problem
Cause
Solution
Workstation powered off
automatically and the Power LED
flashes red two times, once every
second, followed by a two-second
pause.
Processor thermal protection
activated.
A fan might be blocked or not
turning.
OR
The CPU heatsink fan
assembly is not properly
attached to the processor.
1.
Be sure that the workstation air vents are not blocked
and the cooling fan is running.
2.
Open the access panel, press the power button, and
determine if the processor fan spins. If the processor
fan is not spinning, be sure the fan’s cable is plugged
into the system board header. Be sure the fan is
properly seated or installed.
3.
Replace the processor fan.
4.
Reseat the CPU heatsink, and verify that the fan
assembly is properly attached.
Power LED flashes red, once every
two seconds.
Power failure (power supply is
overloaded).
1.
Determine whether a device is causing the problem
by removing all attached devices). Power on the
system. If the system enters the POST, then power
off and replace one device at a time and repeat this
procedure until failure occurs. Replace the device
causing the failure. Continue adding devices one at a
time to ensure all devices are functioning properly.
2.
Verify power supply functionality.
a.
Disconnect AC power.
b.
Remove all internal power supply cables from
the system board.
c.
Plug in AC power.
If the power supply fan spins and the BIST
LED lights, then the power supply is good.
Replace the system board.
If the power supply fan does not spin or the
BIST LED does not light, replace the power
supply.
Solving diskette problems
Table 5-5
Diskette problems
Problem
Cause
Solution
Diskette drive light stays on.
Diskette is damaged.
Right-click
Start
, click
Explore
, and select a drive.
Select
File>Properties>Tools
. Under
Error-checking
,
click
Check Now.
Diskette is incorrectly inserted.
Remove diskette and reinsert.
Files on diskette are damaged.
Check the program diskettes.
Drive cable is not properly
connected.
Reconnect power cable. Be sure that all four pins are
connected.
Drive not found.
Cable is loose.
Reseat diskette drive data and power cables.
Removable drive is not seated
properly.
Reseat the drive.
Table 5-4
Power supply problems (continued)
112
Chapter 5
System diagnostics and troubleshooting
ENWW