HP t5335z Troubleshooting Guide: HP t5335 Thin Clients - Page 11

Power-On Sequence, Beep Codes - usb boot

Get HP t5335z PDF manuals and user guides View all HP t5335z manuals
Add to My Manuals
Save this manual to your list of manuals

Page 11 highlights

Power-On Sequence At power-on, the flash boot block code initializes the hardware to a known state, then performs basic power-on diagnostic tests to determine the integrity of the hardware. Initialization performs the following functions: 1. Initializes CPU and memory controller. 2. Initializes and configures all PCI devices. 3. Initializes USB devices to a known state. 4. The unit boots the operating system. Beep Codes uBoot provides some feedback during startup according to the following table. If the system cannot start up due to a catastrophic error (such as no RAM), no beep sounds; return the unit for service. If the system can start up but encounters some other catastrophic error (such as the SATA flash is unreadable), 3 beeps are played; return the unit for service. In normal operation, the system 1 beep should sound. If the system encounters a recoverable error such as the SATA flash is corrupted, 2 beeps sound to indicate the user should reflash the unit. Number of Beeps 0 1 2 3 Action Return for service. Normal operation. Reflash the unit. Return for service. Power-On Sequence 5

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
Power-On Sequence
At power-on, the flash boot block code initializes the hardware to a known state, then performs basic
power-on diagnostic tests to determine the integrity of the hardware. Initialization performs the
following functions:
1.
Initializes CPU and memory controller.
2.
Initializes and configures all PCI devices.
3.
Initializes USB devices to a known state.
4.
The unit boots the operating system.
Beep Codes
uBoot provides some feedback during startup according to the following table. If the system cannot start
up due to a catastrophic error (such as no RAM), no beep sounds; return the unit for service. If the
system can start up but encounters some other catastrophic error (such as the SATA flash is
unreadable), 3 beeps are played; return the unit for service. In normal operation, the system 1 beep
should sound. If the system encounters a recoverable error such as the SATA flash is corrupted, 2 beeps
sound to indicate the user should reflash the unit.
Number of Beeps
Action
0
Return for service.
1
Normal operation.
2
Reflash the unit.
3
Return for service.
Power-On Sequence
5