Troubleshooting Guide www.hp.com/in 8-19
Troubleshooting
Diagnostic Front Panel LEDs and Audible Codes
(Continued)
Activity
System does not power
on and LEDs are not
flashing.
System gives an error
message stating that
“Error 912 - computer
cover or side panel has
been removed. Make sure
that any system access
was authorized and press
F1 to continue”.
Possible Cause
System unable to
power on.
The chassis side
cover is open or
would have been
removed after
previous power on.
Recommended Action
Press and hold the power button for
less than 4 seconds. If the hard
drive LED turns green, then:
1. Check that the voltage selector,
located on the rear of the power
supply, is set to the appropriate
voltage. Proper voltage setting
depends on your region.
2. Remove the expansion cards one
at a time until the 5V_aux light on the
system board turns on.
3. Replace the systemboard.
OR
Press and hold the power button for
less than 4 seconds. If the hard
drive LED does not turn green then:
1. Check that the unit is plugged into
a working AC outlet.
2. Open hood and check that the
power button harness is properly
connected to the system board.
3. Check that both power supply
cables are properly connected to
the system board.
4. Check to see if the 5V_aux light on
the system board is turned on. If it
is turned on, then replace the
power button harness.
5. If the 5V_aux light on the system
board is not turned on, then
replace the power supply.
6. Replace the system board.
1. Make sure that the Chassis side
cover is closed if not fix it as
directed in the assembling guide.
2. Ensure that any system access was
authorized, check all the hardware
ensuring that no hardware has
been changed or removed. Then
enter the BIOS setup by pressing
F10 then select Hardware Monitor
setup and enable the Reset Case
Open Status.
3. Refer to the F10 Utility Guide for its
functionality and any further issues.
4. For maximum security, be sure to
establish a setup password. The
setup password prevents
unauthorized access to the
Computer Setup utility.
Beeps
None
Continuous
beep for 5
seconds
* Applicable for non China version.