HP 280 G4 Maintenance And Service Manual page 87

Table 7-1 Interpreting system validation diagnostic front panel LEDs and audible codes (continued)
Number of long beeps/blinks
3
4
5
Patterns of blink/beep codes are determined by using the following parameters:
1 second pause occurs after the last major blink.
●
2 second pause occurs after the last minor blink.
●
Beep error code sequences occur for the first 5 iterations of the pattern and then stop.
●
Blink error code sequences continue until the computer is unplugged or the power button is pressed.
●
NOTE: Not all diagnostic lights and audible codes are available on all models.
The red LED blinks to represent the major error category (long blinks). The white LED blinks to represent the
minor error category (short blinks). For example, '3.5' indicates 3 long red blinks and 5 short white blinks to
communicate the processor is not detected.
Table 7-2 Interpreting system validation diagnostic front panel LEDs and audible codes
Category Major/minor code
BIOS
Hardware
Thermal
System board
Error category
Hardware
Thermal
System board
Description
2.2 The main area (DXE) of BIOS has become corrupted and there is no recovery binary
image available.
2.3 The embedded controller policy requires the user to enter a key sequence.
2.4 The embedded controller is checking or recovering the boot block.
3.2 The embedded controller has timed out waiting for BIOS to return from memory
initialization.
3.3 The embedded controller has timed out waiting for BIOS to return from graphics
initialization.
3.4 The system board displays a power failure (crowbar).*
3.5 The processor is not detected.*
3.6 The processor does not support an enabled feature.
4.2 A processor over temperature condition has been detected.*
4.3 An ambient temperature over temperature condition has been detected.
4.4 An MXM over temperature condition has been detected.
5.2 The embedded controller cannot find valid firmware.
5.3 The embedded controller has timed out waiting for the BIOS.
5.4 The embedded controller has timed out waiting for BIOS to return from system
board initialization.
Interpreting system validation diagnostic front panel LEDs and audible codes 79