HP Compaq dx7200 MT Reference Manual page 174

POST Error Messages
POST Diagnostic Front Panel LEDs and Audible Codes (Continued)
Activity
Red Power LED
flashes four times,
once every
second, followed
by a two second
pause.
Red Power LED
flashes five times,
once every
second, followed
by a two second
pause.
Red Power LED
flashes six times,
once every
second, followed
by a two second
pause.
Red Power LED
flashes seven
times, once every
second, followed
by a two second
pause.
Red Power LED
flashes eight times,
once every
second, followed
by a two second
pause.
C–10
Beeps Possible Cause
4 Power failure
(power supply is
overloaded).
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.
390812-001
Recommended Action
Open the hood and ensure the power
supply cable is seated into the connector
on the system board.
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 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.
Replace the power supply.
Replace the system board.
Reseat DIMMs. Power on the system.
Replace DIMMs one at a time to isolate
the faulty module.
Replace third-party memory with HP
memory.
Replace the system board.
For systems with a graphics card:
Reseat the graphics card. Power on the
system.
Replace the graphics card.
Replace the system board.
For systems with integrated graphics,
replace the system board.
Replace the system board.
Reflash the ROM with the latest BIOS
image. See the "ROM Flash" section of the
Desktop Management Guide on the
Documentation and Diagnostics CD.
Replace the system board.
Service Reference Guide, dx7200