HP ProLiant ML570 G4 Server - Manual (Page 15)

Component identification 15
Code Component Status
A0 Pre POST code Standby mode
P5 Power supply No power from the power supply
_5 Power backplane No 5-V power from the power supply backplane board
33 Power backplane No 3.3-V power from the power supply backplane
board
15 1.5-V regulator No 1.5-V power from the voltage regulator on the system
board
Ut Vtt regulator No power from the Vtt regulator on the system
5U PPM failure No power from the PPM
nb No boot Indicates a no-boot situation
SAS and SATA device numbers
The server supports a combination of up to 18 SAS and SATA hard drives in the SAS/SATA hard drive
cage. SAS/SATA devices are numbered 1 through 18.
HP recommends populating hard drive bays starting with the lowest SAS device number.