HP t5325 - Thin Client Průvodce řešením problémů stáhnout pdf (Strana 20)

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.

14 Chapter 4 Diagnostics and Troubleshooting

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HP t5325 - Thin Client Průvodce řešením problémů Strana 20