Interpreting Post Diagnostic Front Panel Leds And Audible Codes - HP 1155 Maintenance And Service Manual

Control panel message
Network Server Mode Active and No
Keyboard Attached
Parity Check 2
Interpreting POST Diagnostic Front Panel LEDs and
Audible Codes
This section covers the front panel LED codes as well as the audible codes that may occur before or
during POST that do not necessarily have an error code or text message associated with them.
WARNING!
the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be
sure to disconnect the power cord from the wall outlet and allow the internal system components to
cool before touching.
NOTE: If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of
the computer and refer to the following table to determine the front panel LED codes.
Recommended actions in the following table are listed in the order in which they should be
performed.
Not all diagnostic lights and audible codes are available on all models.
Activity
Green Power LED On.
Green Power LED flashes
every two seconds.
Description
Keyboard failure while Network Server
Mode enabled.
Parity RAM failure or a PCI/PCIe device is
asserting a SERR#.
When the computer is plugged into an AC power source, voltage is always applied to
Beeps
None
None

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 133

Possible Cause
Computer on.
Computer in Suspend to
RAM mode (some models
only) or normal Suspend
mode.
Recommended action
1. Reconnect keyboard with computer
turned off.
2. Check connector for bent or missing
pins.
3. Ensure that none of the keys are
depressed.
4. Replace keyboard.
Run Computer Setup and Diagnostic
utilities. To disable a PCI/PCIe device from
asserting a SERR#, run the Computer
Setup utility and select Advanced > Bus
Options > SERR# Generation > Disable.
Recommended Action
None
None required. Press any key or move the
mouse to wake the computer.