Interpreting Post Diagnostic Front Panel Leds And Audible Codes - HP Elite 7500 Microtower Maintenance And Service Manual

Table C-2 Diagnostic Front Panel LEDs and Audible Codes (continued)
Activity
Red Power LED flashes five
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
Red Power LED flashes six
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
Red Power LED flashes
seven times, once every
second, followed by a two
second pause. Beeps stop
after fifth iteration but LEDs
continue until problem is
solved.
Red Power LED flashes eight
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
Red Power LED flashes nine
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
Beeps Possible Cause
5 Pre-video memory error.
6 Pre-video graphics error.
7 System board failure
(ROM detected failure
prior to video).
8 Invalid ROM based on
bad checksum.
9 System powers on but is
unable to boot.

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 161

Recommended Action
CAUTION: 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.
For systems with a graphics card:
1. Reseat the graphics card.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated graphics, replace
the system board.
Replace the system board.
1. Reflash the system ROM with the latest
BIOS image. See the "Boot Block
Emergency Recovery Mode" section of the
Desktop Management Guide for more
information.
2. Replace the system board.
1. Check that the voltage selector, located on
the rear of the power supply (some
models), is set to the appropriate voltage.
Proper voltage setting depends on your
region.
2. Unplug the AC power cord from the
computer, wait 30 seconds, then plug the
power cord back in to the computer.
3. Replace the system board.
4. Replace the processor.