HP Z440 Workstation Series Maintenance And Service Manual page 102

Activity
Red Power LED blinks five
times, once every second,
followed by a two-second
pause. Five beeps.
Red Power LED blinks six
times, once every second,
followed by a two-second
pause. Six beeps.
Red Power LED blinks eight
times, once every second,
then stops blinking.
System does not power-on
and LEDs are not blinking.
No beeps.
92 Chapter 4 Diagnostics and troubleshooting
Possible cause
2.
3.
Pre-video memory error. CAUTION:
computer is off. To prevent damage, disconnect the computer power
cord before you remove a component.
1.
2.
3.
4.
Pre-video graphics error. CAUTION:
computer is off. To prevent damage, disconnect the computer power
cord before you remove a component.
(BIOS did not detect a VGA-compatible device)
For systems with integrated graphics, the problem might be the
system board. Contact HP for assistance.
For systems with graphic cards:
1.
2.
3.
Entering FailSafe Either FailSafe detected a corrupted ROM, or the user pressed
(BootBlock) Recovery before powering on. The BIOS does not halt at this point, but
Mode attempts to boot to a ROMPaq floppy or CD-ROM (USB devices are not
supported).
1.
2.
System unable to power CAUTION:
on. computer is off. To prevent damage, disconnect the computer power
cord before you remove a component.
To resolve the problem, choose one of the following options:
Recommended action
Check if a device is causing the problem by removing all
attached devices (such as hard, diskette, or optical drives, and
expansion cards.) Power on the computer. 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.
Check 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 LED lights, then the
power supply is good. Replace the system board.
●
If the power supply fan does not spin or the LED does not
light, replace the power supply.
Internal components might be powered even when the
Reseat DIMMs.
Replace DIMMs one at a time to isolate faulty module.
Replace third-party memory with HP memory.
The problem might be on the system board. Contact HP for
assistance.
Internal components might be powered even when the
Reseat the graphics card.
The problem might be the graphics card.
The problem might be the system board. Contact HP for
assistance.
Reflash ROM with a ROMPaq floppy or CD-ROM.
The problem might be in the system board. Contact HP for
assistance.
Internal components might be powered even when the
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