HP ProDesk 400 G7 SFF, Руководство по техническому обслуживанию и ремонту

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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