HP Z1 G2 Maintenance And Service Manual page 72

Activity
Power LED flashes red four
times, once every second,
followed by a two-second
pause. Four beeps.
Power LED flashes red five
times, once every second,
followed by a two-second
pause. Five beeps.
Power LED flashes red six
times, once every second,
followed by a two-second
pause. Six beeps.
Power LED flashes red
seven times, once every
second, followed by a two-
second pause. Seven beeps.
Power LED flashes red eight
times, once every second,
followed by a two-second
pause. Eight beeps.
64 Chapter 4 Diagnostics and troubleshooting
Possible cause
Power failure (power CAUTION:
supply is overloaded). computer is off. To prevent damage, disconnect the computer power
cord before you remove a component.
1.
2.
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.
Try these solutions in this order:
●
●
●
Processor does not Either install a processor with Intel HD Graphics, or install a supported
support graphics output graphics card.
and no discrete graphics
card is installed.
System board failure 1.
(ROM detected failure
prior to video).
2.
Invalid ROM based on bad CAUTION:
checksum. computer is off. To prevent damage, disconnect the computer power
cord before you remove a component.
1.
2.
Recommended action
Internal components might be powered even when the
Open the access panel and verify that all power connections are
secure on the system board.
To verify if a device is causing the problem, remove all attached
devices (such as hard drives, optical drives, and expansion
cards.) Turn on the computer. If the system enters the POST, turn
off the computer 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 confirm that
all devices are functioning properly.
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 if using nVidia graphics; reseat the
processor if using Intel HD Graphics.
Replace the graphics card if using nVidia graphics or replace the
processor if using Intel HD graphics.
Replace the system board.
Clear CMOS.
NOTE: See Clearing and resetting the CMOS on page 73
details.
The problem might be on the system board. Contact HP for
assistance.
Internal components might be powered even when the
Clear CMOS.
NOTE: See Clearing and resetting the CMOS on page 73
details.
Upgrade the ROM using SoftPaq, either from the hard drive, CD,
diskette, or USB flash drive (for example, HP Drive Key). The ROM
can be flashed by through the F10 Setup Menu by going to
File>Flash System ROM. SoftPaq is a self-extracting executable,
for
for