HP Z600 HP Z600 Workstation Maintenance and Service Guide - Page 194

Diagnostic lights and audible codes continued

Page 194 highlights

Table 6-8 Diagnostic lights and audible codes (continued) Activity Possible cause Recommended action Red Power LED blinks four times, once every second, followed by a two-second pause. Four beeps. Power failure (power supply CAUTION: Internal components might be powered even when the is overloaded) workstation is off. To prevent damage, disconnect the workstation power cord before you remove a component. 1. Open the access panel and ensure that all power connections (18pin Main, 8-pin CPU, 6-pin Memory) are secure on the system board. 2. Check if a device is causing the problem by removing all attached devices (such as hard, diskette, or optical disk drives, and expansion cards.) Power on the workstation. If the system enters the POST, power off and replace one device at a time; repeat this procedure until failure occurs. Replace the device that is causing the failure. Continue adding devices one at a time to ensure all devices are functioning properly. 3. Check the power supply functionality. a. Disconnect the AC power. b. Remove power supply from system chassis. (See Removing the power supply on page 78 for details.) c. Plug in the AC power. If the power supply fan spins and the BIST** LED lights, the power supply is functional. The problem might be on the system board. Contact HP for assistance. If the power supply fan does not spin or the BIST** LED does not light, the problem might be in the power supply. Contact HP for assistance. Red Power LED blinks five times, once every second, followed by a two-second pause. Five beeps. Pre-video memory error CAUTION: Internal components might be powered even when the workstation is off. To prevent damage, disconnect the workstation power cord before you remove a component. 1. Reseat DIMMs. 2. Replace DIMMs one at a time to isolate faulty module. 3. Replace third-party memory with HP memory. 4. The problem might be on the system board. Contact HP for assistance. Red Power LED blinks six times, once every second, followed by a two-second pause. Six beeps. Pre-video graphics error. CAUTION: Internal components might be powered even when the workstation is off. To prevent damage, disconnect the workstation power cord before you remove a component. 1. Reseat the graphics card. 2. The problem might be on the graphics card. Contact HP for assistance. Red Power LED blinks seven times, once every second, followed by a twosecond pause. Seven beeps. System board failure (ROM 1. Clear CMOS. detected failure prior to video). NOTE: Refer to the Maintenance and Service Guide for the workstation model for detailed information on clearing CMOS. 2. The problem might be on the system board. Contact HP for assistance. 182 Chapter 6 Diagnostics and troubleshooting ENWW

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Activity
Possible cause
Recommended action
Red Power LED blinks four
times, once every second,
followed by a two-second
pause. Four beeps.
Power failure (power supply
is overloaded)
CAUTION:
Internal components might be powered even when the
workstation is off. To prevent damage, disconnect the workstation power
cord before you remove a component.
1.
Open the access panel and ensure that all power connections (18-
pin Main, 8-pin CPU, 6-pin Memory) are secure on the system board.
2.
Check if a device is causing the problem by removing
all
attached
devices (such as hard, diskette, or optical disk drives, and expansion
cards.) Power on the workstation. If the system enters the POST,
power off and replace one device at a time; repeat this procedure
until failure occurs. Replace the device that is causing the failure.
Continue adding devices one at a time to ensure all devices are
functioning properly.
3.
Check the power supply functionality.
a. Disconnect the AC power.
b. Remove power supply from system chassis. (See
Removing the power
supply
on page
78
for details.)
c. Plug in the AC power.
If the power supply fan spins and the BIST
**
LED lights, the power supply
is functional. The problem might be on the system board. Contact HP for
assistance.
If the power supply fan does not spin or the BIST
**
LED does not light, the
problem might be in the power supply. Contact HP for assistance.
Red Power LED blinks five
times, once every second,
followed by a two-second
pause. Five beeps.
Pre-video memory error
CAUTION:
Internal components might be powered even when the
workstation is off. To prevent damage, disconnect the workstation power
cord before you remove a component.
1.
Reseat DIMMs.
2.
Replace DIMMs one at a time to isolate faulty module.
3.
Replace third-party memory with HP memory.
4.
The problem might be on the system board. Contact HP for
assistance.
Red Power LED blinks six
times, once every second,
followed by a two-second
pause. Six beeps.
Pre-video graphics error.
CAUTION:
Internal components might be powered even when the
workstation is off. To prevent damage, disconnect the workstation power
cord before you remove a component.
1.
Reseat the graphics card.
2.
The problem might be on the graphics card. Contact HP for
assistance.
Red Power LED blinks
seven times, once every
second, followed by a two-
second pause. Seven
beeps.
System board failure (ROM
detected failure prior to
video).
1.
Clear CMOS.
NOTE:
Refer to the
Maintenance and Service Guide
for the
workstation model for detailed information on clearing CMOS.
2.
The problem might be on the system board. Contact HP for
assistance.
Table 6-8
Diagnostic lights and audible codes (continued)
182
Chapter 6
Diagnostics and troubleshooting
ENWW