Table 7-2
Interpreting POST diagnostic front panel lights and audible codes (continued)
Activity
Beeps
Possible cause
Recommended action
Red power light blinks four times,
once every second, followed by a
two-second pause. Beeps stop
after fifth iteration, but lights
continue until problem is solved.
4
Power failure (power supply
is overloaded).
1.
Check if 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 that is causing the failure.
Continue adding devices one at a time to ensure
all devices are functioning properly.
2.
Replace the power supply.
3.
Replace the system board.
Red power light blinks five times,
once every second, followed by a
two-second pause. Beeps stop
after fifth iteration, but lights
continue until problem is solved.
5
Pre-video memory error.
IMPORTANT:
To avoid damage to the DIMMs or the
system board, you must unplug the computer power
cord before attempting to reseat, install, or remove a
DIMM module.
1.
Reseat DIMMs.
2.
Replace DIMMs one at a time to isolate the faulty
module.
3.
Replace third-party memory with HP memory.
4.
Replace the system board.
Red power light blinks six times,
once every second, followed by a
two-second pause. Beeps stop
after fifth iteration, but lights
continue until problem is solved.
6
Pre-video graphics error.
Replace the system board.
Red power light blinks seven
times, once every second,
followed by a two-second pause.
Beeps stop after fifth iteration,
but lights continue until problem
is solved.
7
System board failure (ROM
detected failure prior to
video).
Replace the system board.
Red power light blinks eight
times, once every second,
followed by a two-second pause.
Beeps stop after fifth iteration,
but lights continue until problem
is solved.
8
Invalid ROM based on bad
checksum.
1.
Reflash the system ROM with the latest BIOS
image.
2.
Replace the system board.
96
Chapter 7 POST error messages
ENWW
Summary of Contents for ProDesk 400 G7 SFF
Page 8: ...Index 125 viii ENWW ...
Page 12: ...4 Chapter 1 Product features ENWW ...
Page 56: ...48 Chapter 4 Removal and replacement procedures ENWW ...
Page 82: ...74 Chapter 5 Troubleshooting without diagnostics ENWW ...
Page 106: ...98 Chapter 7 POST error messages ENWW ...
Page 128: ...120 Chapter 11 Statement of memory volatility ENWW ...
Page 132: ...124 Chapter 13 Specifications ENWW ...
Page 136: ...128 Index ENWW ...
